IRCUIT ESIGN UIDE World's Most Versatile Synchronous Buck Convert
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MIC2182
IRCUIT ESIGN UIDE
World's Most Versatile Synchronous Buck Converter
Micrel's MIC2182 synchronous buck regulator offers high efficiency dc/dc conversion suitable multitude applications. With n-channel synchronous architecture, MIC2182 capable delivering without need external MOSFET drivers. same time, MIC2182 capable transitioning "skip" mode, needed, improve efficiency lower power levels. Though MIC2182 rated operation from 4.5V input voltage range, device convert lower voltage supply lines, like 3.3V 2.5V, provided that least bias applied pin. MIC2182 programmed output voltages down 1.25V lower with extra components) capable meeting ever-decreasing voltage levels latest high performance DSPs CPUs.
Features
efficiency output current without external drivers input Frequency foldback short circuit protection Cycle-by-cycle current limit Shutdown current <0.1µA 300KHz operation Sync 600KHz 0.6% total regulation Adjustable UVLO Available SOP-16 SSOP-16
Applications
power distribution systems Notebook subnotebook computers Termination circuits
2.5V input capability
INPUT 2.5V
100%
Bias ENABLE
Efficiency
3.3V 2.5V 3.3V 1.8V 2.5V 1.8V
Dual Triple output circuits available
10A, 15A, Circuit available
Sync.
Output Current (Amps)
MIC2182
Soft start
Applications
Input Voltage Circuit (VIN down 2.5V) Dual Output Circuit 5-Bit Circuit Output Voltage Circuit (<1.2V) High Input Voltage Circuit (55V) Efficient SSTL Switching Regulator Current-Sharing Circuit Circuit Circuit Circuit Circuit Available Evaluation Boards
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Efficient Input Voltage Circuit (VIN down 2.5V)
Though MIC2182 rated operation between 4.5V input, convert input voltages 2.5V long bias applied (10). bias available your application, charge pump used provide voltage. figure figure charge-pump ideas. circuit below shows VOUT converter. changing only feedback resistor ratio, same basic circuit could configured following applications:
3.3V 3.3V 2.5V VOUT 2.5V 1.8V 1.8V R4() R13() 22.6k 22.6k IOUT
Table Applications
3.3V 330µF 6.3V 330µF 6.3V 330µF 6.3V
VBIAS 100k
MIC2182BSM
4.7µF
Si4884
0.1µF
SD103BWS
Si4884
0.015 B530 0.015 0.015 390uf 6.3V 390uf 6.3V 390uf 6.3V 0.1uf
VOUT 2.5V/15A
EN/UVLO
0.1µF
Si4884
Si4884
COMP SYNC
PGND VOUT VREF
Si4884
0.1µF
0.1µF
2.2nF
SGND
Figure 3.3VIN 2.5VOUT Converter
Split Input Supplies Efficiency
EFFICIENCY
3.3V 2.5V
2.5V 1.8V 3.3V 1.8V
INPUT CURRENT
Graph Efficiency Results
Micrel Semiconductor
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VINPUT
2N4403
CD4049UB
SD103BWS SD103BWS
CD4049UB
CD4049UB
CD4049UB
CD4049UB
VBIAS 2N4401 4.7µF
5.62k
5.62k
CD4049UB
Figure Charge Pump Circuit
VINPUT 2N4403
MIC1557
SD103BWS SD103BWS VBIAS
6.04k 2N4401
4.7µF
Figure Charge Pump Circuit
Input Voltage Circuit Bill Material
Reference C10, C11, C12, R2a, R2b,
Note Note Note
Part Number 594D397X06R3R2T YJ0805Y222MXAAT YJ0805Y104MXAAT 293D475X0016A2 B530 SD103BWS CDSH2-3 UP4B-1R0 Si4884DY
Manufacturer Vishay/Sprague(1) Vishay/Sprague(1) Vishay/Sprague(1) Vishay/Sprague(1) Vishay/Lite-On(2) Vishay/Lite-On Central Semiconductor(3) Coiltronics(4) Vishay/Siliconix(5)
Description 390µF, 6.3V, tantalum 2.2nF, 50V, ceramic 0.1µF, 50V, ceramic 4.7µF, 16V, tantalum 30V, Schottky diode 100mA, 30V, Schottky diode 1µH, inductor MOSFET 1/10W ±1%, size 0805 0.015 ±1%, size 2512 1/10W ±1%, size 0805 100k 1/10W ±1%, size 0805 High-Efficiency Synchronous Buck Controller
CRCW08052001FRT1 Vishay-Dale(6) WSL-2512-R015-F Vishay-Dale
CRCW08051002FRT1 Vishay-Dale CRCW08051003FRT1 Vishay-Dale MIC2182BM Micrel
Note Note Note
Vishay/Sprage (603) 224-1961. Vishay/Lite-On (805) 446-4800. Central Semiconductor (516) 435-1110.
Coiltronics (561) 241-7876. Vishay/Siliconix (408) 988-8000. Vishay-Dale (402) 644-4218.
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
EFFICIENCY
Dual Output Efficiency
Dual Output Circuit
IOUT 3.3V
circuit shows cost generate outputs from MIC2182 synchronous buck controller. second winding output inductor produces second voltage. This secondary voltage good line regulation fair output load regulation. linear regulator (LDO) secondary output improves line/load regulation reduces output ripple. efficiency, including power losses shown graph Evaluation boards available this application.
Graph Efficiency Results
Micrel Semiconductor
33µF 33µF MIC39100-5.0BS B130 SD103BWS 33µF VOUT 0.1µF
100k
5,6,7,8 1,2,3 5,6,7,8 1,2,3
0.1µF 0.1µF N=0.789 Si4800DY
VOUT2 5.0V@0.5A
33µF
EN/UVLO
0.020 220µF 6.3V 220µF 6.3V 0.1µF
MIC2182BSM-3.3 Si4800DY PGND
Sync
5.5µH Coiltronics B130 CTX04-15025
VOUT1 3.3V@2.5A
Comp 0.1µF
TEL: 1.800.401.9572 FAX: 1.408.474.0159
VOUT
SGND
VREF 0.1µF
2.2nF
0.1µF
HTTP:// www.micrel.com
Figure Dual Output 8-24VIN 3.3VOUT 2.5V 5VOUT 0.5A
Dual Output Circuit Bill Material
Reference C12, C14, C10, Part Number YJ0805Y104MXAAT YJ0805Y222MXAAT 594D227X06R3C2T 593D336X0010C2 293D475X0016A2 594D336X035R2 B130 SD103BWS CMDSH2-3 CTX04-15025 Si4800DY CRCW08052001FRT1 WSL-2010-R020-F CRCW08051003FRT1 MIC2182BSM-3.3 MIC39100-5.0BS Manufacturer Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Central Semiconductor Coiltronics Siliconix Vishay/Dale Vishay/Dale Vishay/Dale Micrel Micrel Description 0.1µF 50V, ceramic 2.2nF 50V, ceramic 220µF 6.3V, tantalum 33µF 20V, tantalum 4.7µF 16V, tantalum 22µF 35V, tantalum 30V, Schottky diode 100mA 30V, Schottky diode winding inductor MOSFET 0.020 (2010 size) 100k Buck Controller Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
5-Bit Circuit
following circuit shows cost control MIC2182 from 5-bit input. Table shows 5-bit code resulting output voltages. Signal VID4 switches out, which changes voltage step size (50mV step VID4 100mV step VID4 high). VID4 also switches out, which
changes starting voltage (1.3V minimum VID4 2.0V minimum VID4 high). cost MOSFET, such 2N7002, used switch. optional power circuit (POK), with separate reference, monitors feedback voltage insure proper operation converter.
330µF 4.7µF
330µF
330µF
100k
0.1µF
SD103BWS Si4884DY Si4884DY 3.3µH Coiltronics Si4884DY Si4884DY B330 0.1µF
EN/UVLO
0.1µF
0.015 0.013
VOUT =1.3V 3.5V IOUT =10A 220µF 6.3V 220µF 6.3V 0.1µF
MIC2182-ADJ Sync Comp PGND
VOUT SGND
2N7002
2.2nF
0.1µF
CD4049UB VID3 VID2 VID1 VID0 VID4
100k 100k 100k
CD4049UB
226k
30.9k 2N7002
61.9k 2N7002
124k 2N7002
249k 2N7002
38.3k
CD4049UB
2N7002
CD4049UB
CD4049UB
100k
Figure MIC2182, 10A, Synchronous Buck Circuit
24.9K
100k 100k MIC6270 2.2M 2N7002
100k LM4041CIM3-1.2
470pF
Figure Power Good Circuit
Micrel Semiconductor
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VID4
VID3
VID2
VID1
VID0
VOUT 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05
Table Output Voltage Identification Codes
Micrel Semiconductor
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5-Bit Circuit Bill Material
Reference C12, C10, C11, Q10, R10, R11, R15, R16, R23, R24, MIC2182BM MIC6270BM5 LM4040CIM3-1.2 CD4049UB B330 SD103BWS CMDSH2-3 UP4B-3R3 Si4884DY 2N7002 CRCW08052001FRT1 WSL-2010-R015-F WSL-2010-R013-F 594D227X06R3D2T 293D475X0016A2 594D337X0010R2T Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Central Semiconductor Coiltronics Siliconix General Semiconductor Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Micrel Micrel Micrel Vendor Part Number Manufacturer Description 2.2nF 50V, ceramic 0.1µF X7R, ceramic 1nF, ceramic 220µF 6.3V, tantalum 4.7µF 16V, tantalum 330µF 10V, tantalum 470pF, ceramic 30V, Schottky diode 100mA 30V, Schottky diode 3.3µH, inductor MOSFET MOSFET 0.015 (2010 size) 0.013 (2010 size) 100k 124K 61.9K 30.9K 226K 38.3K 249K 24.9K 2.2M Buck Controller Comparator Reference Inverter Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
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Output Voltage Circuit 1.2V)
Micrel Semiconductor
150µF 150µF 4.7µF SD103BWS 24.9k
This circuit allows output voltages below internal 1.245V reference. external 1.225V reference, reduces voltage resistor divider (R4, R13) 1.225V. output voltage following formula:
VOUT 1.245 1.225
100k
5,6,7,8
0.1µF
TEL: 1.800.401.9572 FAX: 1.408.474.0159
1,2,3 5,6,7,8 1,2,3
0.1µF 3.3µH Coiltronics B130 0.015 Si4884DY
LM4040-1.2 VOUT 1.2V IOUT 220µF 6.3V 220µF 6.3V 0.1µF
EN/UVLO
Si4884DY PGND
MIC2182-ADJ
Sync
Comp 0.1µF
HTTP:// www.micrel.com
VOUT
SGND
9.76k 10.2k
2.2nF
0.1µF
Figure Output Voltage Circuit
Output Voltage Circuit 1.2V) Bill Material
Reference C12, C10, MIC2182BM LM4040CIM3-1.2 594D227X06R3D2T 293D475X0016A2 594D157X0010D2T B130 SD103BWS CDSH2-3 UP2B-3R3 Si4884DY CRCW08052001FRT1 WSL-2512-R015-F Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Central Semiconductor Coiltronics Siliconix Vishay/Dale Vishay/Dale Vendor Vendor Vendor Vendor Micrel Micrel Part Number Manufacturer Description 2.2nF 50V, ceramic X7R, ceramic 0.1µF X7R, ceramic 220µF 6.3V, tantalum 4.7µF 16V, tantalum 150µF 10V, tantalum 30V, Schottky diode 100mA 30V, Schottky diode 3.3µH, inductor MOSFET 0.015 (2512 size) 24.9K 9.76K 100K 10.2K Buck Controller 1.2V Reference Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
High Input Voltage Circuit (55V)
This circuit allows MIC2182 operate with input voltage greater than 32V. regulate MIC2182 supply voltage approximately 15V. Transistors form cascade driver,
buffering MIC2182 from high input voltage. Capacitor supplies voltage high side MOSFET gate drive. charges approximately when side MOSFET turns flies when high side MOSFET turns
MMBD4148 680µF
4.7µF
MMBT3906
0.1µF
FZT491CT BZX84C15
MMBT2222A IRFZ44ES
MIC2182-5.0BSM 0.1µF
4.7µF
MMBD4148 2N7002 MMBD4148
100k
10µH 0.01 IRLZ44NS B360
VOUT 5.0V/8A C2a,b 330µF
EN/UVLO
COMP SYNC
PGND VREF
0.01µF 0.01µF
SGND
0.1µF
Figure High-Voltage Circuit
Micrel Semiconductor
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High Input Voltage Circuit (55V) Bill Material
Reference C1a, C2a, MIC2182BSM Micrel 293D475X0025C2 B360 MMBD4148 BZX84C15 HM77-22006 IR-IRFZ44ES IR-IRLZ44NS 2N7002 MMBT2222A MMBT3906 FZT491CT WSL-2512-R010-F Vishay/Lite-On Vishay/Lite-On Vishay/Lite-On Zetez Vishay/Dale Beckman Industries Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Part Number 63MV680GX TPSV337M010R0060 293D475X0016A2 Manufacturer Sanyo Vishay/Sprague Description 680µF, 63V, 0.06, tantalum 4.7µF, 16V, tantalum 0.1µF, ceramic 0.01µF, ceramic 4.7µF, 25V, tantalum 60V, Schottky diode 75V, Schottky diode 60V, 0.023 55V, 0.022 N-Channel MOSFET, transistor, transistor, transistor, 0.01, ±1%, size 2512 20k, 10k, 100k, 30.1k, 221, Buck Controller Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Efficient SSTL Switching Regulator
MIC2182's synchronous output architecture inherently gives ability source sink load current, lending regulator termination voltage SSTL, HSTL, PECL, GTL+, LV-TTL, LVCMOS, VME, CMOS, Rambusand other interface standards.
Feedback
SSTL, output voltage (VTT) regulator forced track half input voltage (VDDQ). reference internal error amplifier bypassed external error amplifier used. MIC2182 error amplifier transconductance amplifier with high output impedance output current. Because this, input amplifier shorted, forcing output error amplifier high. output external, output impedance, high output current feedback error amplifier then tied directly (comp). reference error amplifier developed resistive divider VDDQ input voltage.
Control
characteristics internal current error amplifier disabled this application. Operation confined voltage mode control internal ramp which already available. current amplifier disabled connecting VOUT together tying them both input voltage.
Bias
proper bias MIC2182, additional supply rail required. regulator supply tied directly (VDD). High bias voltages, 32V, must connected only (VIN).
least volts required MIC2182. readily available, generated from VDDQ (2.5V min.) micropower boost converter like MIC2142.
Input Capacitor
high capacitor added input dampen oscillations high nature tantalum capacitors input.
VDDQ
5.0V 0.1µF 220µF MIC7300 .001µF
MIC2182 COMP SGND SYNC EN/UVLO PGND VOUT
SD103BWS Q2a,b Si4884 0.1µF 3.3µH
390µF 390µF 6.3V 6.3V
Q1a, Si4884
B330 Vishay
220µF 6.3V 220µF 6.3V
0.01µF
3.32k 100k
0.1µF
4.7µF
VDDQ
Figure SSTL Terminator
Micrel Semiconductor
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Efficiency SSTL Switching Regulator Bill Material
Reference C11, Q1a, Q2a, UUR1C221MNRIGS 594D227X06R3D2T B330 SD103BWS CDSH2-3 UP4B-3R3 Si4884DY CRCW08052001FRT1 CRCW08052001FRT1 CRCW08051003FRT1 MIC2182BM MIC7300BM5 Nichicon Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Central Semiconductor Coiltronics Vishay/Siliconix Vishay/Dale Vishay/Dale Vishay/Dale Micrel Micrel 293D475X0016A2 594D397X06R3R2T Part Number Manufacturer Vishay/Sprague Vishay/Sprague Description 1nF, ceramic 0.1µF 50V, ceramic 4.7µF 16V, tantalum 390µF 6.3V, tantalum 0.01µF ceramic 220µF 16V, 220µF 6.3V, tantalum 40V, Schottky diode 100mA 30V, Schottky diode 3.3µH, inductor MOSFET 100k 3.32k High-efficiency Sync. Buck Controller Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics Nichicon
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876 (847) 843-7500
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Current-Sharing Circuit
circuit below shows connect MIC2182 parallel. This useful configuration total output current more than single supply handle. primary regulator operates normal MIC2182 controller. secondary regulator uses external
operational amplifier sense voltage across primary regulator's current sense resistor force secondary regulator match output current. regulators share same input voltage source operate from different inputs long input voltages similar (within each other).
VIN2 180µF SD103BWS 180µF
100k
0.1µF
4.7µF
EN/UVLO MIC2182BM
0.1µF
5,6,7,8
Si4884DY
1,2,3 5,6,7,8
0.025 3.3µH UP4B-3R3 0.020 330µF 6.3V
VOUT 3.3V IOUT
Si4884DY
1,2,3
Sync Comp
PGND
B130
VOUT SGND
0.1µF
10nF
VIN1
LM358 220µF 4.7µF
220µF
10nF
100k
0.1µF
SD103BWS
0.1µF
5,6,7,8
EN/UVLO
Si4884DY
1,2,3
0.025
MIC2182BM
5,6,7,8
Si4884DY
1,2,3
Sync Comp
PGND
B130
3.3µH UP48-3R3
0.020
330µF 6.3V
330µF 6.3V
VOUT SGND
49.9k
0.1µF
0.1µF 6.04k
220pF 10nF 0.1µF
Figure Parallel Converter
Micrel Semiconductor
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Current-Sharing Parallel Converters Bill Material
Reference C23, C12, C13, C18, C20, R2a, R2b, MIC2182BM LM358 LR2010-01-R020-F WSL-2010-R020-F LR2010-01-R025-F WSL-2010-R025-F 594D337X06R3D2T 293D475X0016A2 B130 SD103BWS CMDSH2-3 UP4B-3R3 Si4884DY C10, C11, C16, 594D187X0016R2T Part Number Manufacturer Vishay/Sprague Vishay/Sprague Vishay/Sprague Vishay/Lite-On Vishay Central Semiconductor Coiltronics Vishay/Siliconix Vishay Vishay Micrel Description 220pF 50V, ceramic 10nF X7R, ceramic 0.1µF X7R, ceramic 330µF, 6.3V, tantalum 220µF 16V, tantalum 4.7µF 16V, tantalum 30V, Schottky diode 100mA 30V, Schottky diode 3.3µH, inductor MOSFET 49.9k 0.020 (2010 size) 0.025 (2010 size) 6.04k, 100k Buck Controller LM358 Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Circuit
Circuit Efficiency
5VIN skip 12VIN 24VIN 0.01 OUTPUT CURRENT 10µH 3.3V EFFICIENCY
Micrel Semiconductor
Graph Efficiency Results
22µF 22µF SD103BWS 0.1µF Si4800DY 10µH
OPTION OPTION OPTION OPTION
following circuit MIC2182BSM evaluation board. input voltage range between 4.5V 28V. Ouput voltages 1.8V, 2.5V, 3.3V selected with proper jumper connection. Full load efficiency over 90%.
MIC2182BSM EN/UVLO
UVLO 4.7µF
100k
open
TEL: 1.800.401.9572 FAX: 1.408.474.0159
0.020 Si4800DY B140 PGND C13, VOUT FB/VREF SGND
FIXED VERSIONS ONLY
0.1µF
MODE: OPEN AUTO CLOSED
VOUT 220µF 220µF
OPTION
SYNC COMP SYNC
0.1µF 22.6k
OUTPUT VOLTAGE SELECTION
0.1µF 0.1µF
DEVICE VERSION: OPEN FIXED CLOSED ADJ.
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MUST CONNECTED ADJUSTABLE VERSION PRECAUTIONS PAGE
1.8V 2.5V
6.04k 3.3V
3.32k
SYNC: OPEN EXTERNAL CLOSED INTERNAL
Figure Evaluation Board Schematic
Circuit Bill Material
Reference C10, C14, CRCW08051003FRT1 CRCW08056041FRT1 CRCW08052262FRT1 Si4800DY MIC2182BSM Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Siliconix Micrel B140 SD103BWS CMDSH2-3 CDRH127-100 CRCW08051002FRT1 WSL-2010-R020-F LR2010-01-R020-F CRCW08053321FRT1 08055C102MAT2A 08055C104MAT2A TPSE227M010R0100 TAJA475M016R TPSE226M035R0300 Part Number Manufacturer Vishay/Lite-On Vishay/Lite-On Central Semiconductor Sumida Vishay/Dale Vishay/Dale Vishay/Dale Description 0.1µF 25V, ceramic 50V, ceramic 0.1µF 25V, ceramic 220µF 10V, tantalum 4.7µF 16V, tantalum 22µF 35V, tantalum open (0805 size) 40V, Schottky 100mA 30V, Schottky diode 10µH 0.020 (2010 size) 3.32k open 100k 6.04k 22.6k MOSFET Qty.
High-Efficiency Synchronous Buck Controller
Used with MIC2182-x.xBSM (fixed) applications only.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Central Semiconductor Sumida
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (516) 435-1110 (847) 956-0666 (803) 448-9411
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Circuit
0.01 OUTPUT CURRENT VOUT 3.3V Skip EFFICIENCY 7.5m 3.3µH
MIC2182 Efficiency
Micrel Semiconductor
Graph Efficiency Results
220µF 220µF 220µF SD103BWS 0.1µF Si4884 Si4884
OPTION OPTION
following circuit MIC2182BM evaluation board. input voltage range between 10V. Output voltages 1.8V, 2.5V 3.3V selected with proper jumper connection. Full load offering over 90%.
MIC2182BM EN/UVLO
UVLO 4.7µF
100k
open
TEL: 1.800.401.9572 FAX: 1.408.474.0159
3.3µH
OPTION OPTION
0.1µF
Si4884 Si4884
0.015 B330
MODE: OPEN AUTO CLOSED
PGND C13, 0.1µF VOUT FB/VREF SGND
VOUT 0.013 470µF 6.3V 470µF 6.3V
SYNC COMP SYNC
0.1µF
0.1µF 0.1µF
OPTION
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DEVICE VERSION: FIXED VERSIONS OPEN FIXED, CLOSED ADJ. ONLY MUST CONNECTED ADJUSTABLE VERSION PRECAUTIONS PAGE
2.2nF
OUTPUT VOLTAGE SELECTION
22.6k 1.8V
2.5V
6.04k 3.3V
OPTION
SYNC: OPEN EXTERNAL CLOSED INTERNAL
Figure Evalutation Board Schematic
Circuit Bill Material
Reference C14, C12, C10, C11, CRCW08051002FRT1 CRCW08051003FRT1 MIC2182BM Vishay/Dale Vishay/Dale Micrel TPSV477M006R0055 TAJA475M016R TPSV227M010R0060 B330 SD103BWS CMDSH2-3 UP4B-3R3 Si4884DY CRCW08052001FRT1 WSL-2010-R015-F WSL-2010-R013-F Part Number Manufacturer Vishay/Lite-On Vishay/Lite-On Central Semiconductor Coiltronics Vishay/Siliconix Vishay/Dale Vishay/Dale Vishay/Dale Description open (0805 size) 2.2nF 50V, ceramic 0.1µF 50V, ceramic 50V, ceramic 470µF 6.3V, tantalum 4.7µF 16V, tantalum 220µF 10V, tantalum 30V, Schottky diode 100mA 30V, Schottky diode 3.3µH MOSFET 0.015 (2010 size) 0.013 (2010 size) open 100k High-Efficiency Synchronous Buck Controller Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Central Semiconductor Sumida
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (516) 435-1110 (847) 956-0666 (803) 448-9411
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Circuit
Micrel Semiconductor
100µF 100µF B130 4.7µF SD103BWS
This simple circuit provides output with input. MIC4452 MOSFET drivers used reduce switching losses heating MOSFETs.
100µF
100k
0.1µF
SUD50N03-07 MIC4452BM SUD50N03-07 2.2µH Coiltronics B530C 0.015 470µF 6.3V 6.3V 0.010 2.5VOUT
TEL: 1.800.401.9572 FAX: 1.408.474.0159
UVLO/SD MIC2182BM
0.1µF
Sync Comp
PGND
MIC4452BM
0.1µF
0.1µF
SGND
HTTP:// www.micrel.com
VREF
2.2nF
0.1µF
Figure 12VIN, 2.5VOUT
12VIN, 2.5VOUT Circuit Bill Material
Reference C12, C10, C11, TPSV477M006R0055 TAJA475M016R TPSV107M020R0085 B530 SD103BWS CMDSH2-3 B130 UP4B-2R2 SUD50N03-07 CRCW08052001FRT1 WSL-2010-R010-F WSL-2010-R015-F CRCW08051002FRT1 CRCW08051003FRT1 MIC2182BM MIC4452BM Part Number Manufacturer Vishay/Lite-On Vishay/Lite-On Central Semiconductor Vishay/Lite-On Coiltronics Vishay/Siliconix Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Vishay/Dale Micrel Micrel Description 1µF, ceramic 2.2nF 50V, ceramic X7R, ceramic 0.1µF X7R, ceramic 470µF 6.3V, tantalum 4.7µF 16V, tantalum 100µF 20V, tantalum 30V, Schottky diode 100mA 30V, Schottky diode 30V, Schottky diode 2.2µH, inductor MOSFET 0.010 (2010 size) 0.015 (2010 size) 100k High-efficiency Sync. Buck Controller MOSFET Driver Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (516) 435-1110 (561) 241-7876
Table Component Vendors
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Circuit
Micrel Semiconductor
470µF 470µF 470µF SD103BWS 4.7µF SD103BWS MIC4452BM SUD50N03-10P
Shown below MIC2182BM circuit. input voltage range between 10V. Since larger MOSFETs needed provide 20A, MIC4452 MOSFET drivers used provide needed gate drive.
100k
0.1µF
TEL: 1.800.401.9572 FAX: 1.408.474.0159
0.1µF
EN/UVLO MIC4452BM B530
VOUT 3.3V 1.8µH 0.015 390µF 6.3V 0.015 0.015 0.015 390µF 6.3V 390µF 6.3V
MIC2182-ADJ
0.1µF
Sync
PGND
Comp
HTTP:// www.micrel.com
VOUT
49.9k
0.1µF
SGND
0.1µF
6.04k
Figure Synchronous Buck Evaluation Board
Synchronous Buck Converter Bill Material
Reference C12, C10, C11, R2a, R2b, MIC2182BM MIC4452BM Micrel Micrel WSL-2512-R015-F Dale 594D397X06R3R2T TAJA475M016R 94SV477X06R3F B530C SD103BWS CDEP149-1R8MC SUD50N03-10P Part Number Manufacturer Vishay/Sprague Vishay/Sprague Vishay/Lite-On Vishay/Lite-On Sumida Siliconix Description 50V, ceramic X7R, ceramic 0.1µF X7R, ceramic 390µF, 6.3V, 0.045 4.7µF 16V, tantalum 470µF 10V,OS-CON 30V, Schottky diode 100mA 30V, Schottky diode 1.8µH, inductor MOSFET 49.9k 0.015 (2512 size) 6.04k, 100k High-efficiency Sync. Buck Controller MOSFET Driver Qty.
Vendor Vishay/Lite-On Vishay/Dale Vishay/Siliconix Vishay/Sprague Central Semiconductor Coiltronics
Telephone Number (805) 446-4800 (402) 644-4218 (408) 988-8000 (603) 224-1961 (516) 435-1110 (561) 241-7876
Table Component Vendors
Evaluation Boards
following evaluation boards available through your local Micrel Sales Representatives: Evaluation Board Evaluation Board Dual/Triple Output Evaluation Board
Micrel Semiconductor
TEL: 1.800.401.9572 FAX: 1.408.474.0159
HTTP:// www.micrel.com
Stock M-0283
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