Dual Controllers Step Down Synchronous Linear Controller Provides
|
|
|
Top Searches for this datasheet
APW7060
Dual Controllers Step Down Synchronous Linear Controller
Provides Regulated Voltages
Synchronous DC/DC Buck Controller Linear Controller
General Description
APW7060 integrates synchronous buck controller linear controller provide regulated voltages single package. controller drives external N-channel MOSFETs operates fixed 600kHz frequency. When input supply drops close output, upper MOSFET remains achieving 100% duty cycle. Internal loop compensation optimized fast transient response, eliminating external compensation network. linear controller drives external N-channel MOSFET form linear regulator. internal 0.8V reference makes this part suitable wide variety voltage applications. APW7060 undervoltage lockout circuitry ensures that both 5VCC 12VCC must present before internal circuitry power Soft start internally will bring both outputs into regulation controlled manner. When either output goes into short, soft start will initiated. short condition still remains after three cycles, both regulators will shut down. restart both regulators, recycle voltage 5VCC 12VCC momentarily pull above 1.28V. APW7060 shutdown pulling above 1.28V. shutdown, gate drive signals will low. This dual controller available SO-14 package.
0.8V Internal Reference Voltage
Both Controllers: 0.8V Line, Load Temp.
Output Voltage Range
Controller 0.8V Linear Controller 0.8V (12VCC-VGSpass)
Full Duty Cycle Range Controller
100%
Internal Loop Compensation Controller Internal Soft Start Short Circuit Protec
tion both Controllers
Both Controllers Drive N-Channel MOSFETs Small Converter Size
600kHz Constant Switching Frequency Simple SO-14 Package
Shutdown Control Lead Free Available (RoHS Compliant)
Applications
Motherboard Graphics Cards 12V, 3.3V Inputs DC-DC Converter Supplies Embedded processor supplies
Pinouts
LGATE 5VCC DRIVE2 UGATE 12VCC
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. Mar., 2005 www.anpec.com.tw
APW7060
Ordering Marking Information
7060
Lead Free Code Handling Code Temp. Range Package Code 7060 7060 XXXXX Package Code SOP-14 Operating Junction Temp. Range 70°C Handling Code Tube Tape Reel Lead Free Code Lead Free Device Blank Original Device XXXXX Date Code
Notes ANPEC lead-free products contain molding compounds/die attach materials 100% matte plate termination finish; which fully compliant with RoHS compatible with both SnPb lead-free soldiering operations. ANPEC lead-free products meet exceed lead-free requirements IPC/JEDEC STD-020C classification lead-free peak reflow temperature.
Block Diagram
5VCC 12VCC
Under Voltage Lockout
UVLO
UGATE
0.5V
UVP1
Soft-Start Fault Logic
Gate Control
LGATE
Inhibit Soft-Start
UVP2
Error plifier VREF 0.8V
0.5V 12VC
Shutdown
1.28V
Linear ontroller
DRIVE2
Oscillator
600kH
Figure
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Typical Application
+3.3V
470uF
12VC
+3.3V
470uF
UGATE IVE2
470pF
7060
470uF
+1.26
+2.5V/3A
470uF
68nF
APM2014N APM2014N APM2055N Schottky Diode C10, 470uF/6.3V, ESR=30m Figure
Absolute Maximum Ratings
Symbol Parameter 5VCC Supply Voltage (5VCC GND) 12VCC Supply Voltage (12VCC GND) UAGTE, DRIVE2 LGATE, Maximum Junction Temperature Storage Temperature Maximum Soldering Temperature, Seconds Minimum Rating (Human body model) Rating -0.3 -0.3 -0.3 -0.3 Unit
Thermal Characteristics
Symbol Parameter Junction-to-Ambient Resistance free (SOP-14)
Value
Unit
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Recommended Operating Conditions
Symbol OUT1 OUT2 5VCC Supply Voltage 12VCC Supply Voltage Output Voltage Buck converter Input Voltage Buck converter Output Voltage Linear Regulator Input Voltage Linear Regulator Ambient Temperature Junction Temperature Parameter
(Note)
Range 3.3/5 3.3/5
Unit
Note Refer typical application circuit
Electrical Characteristics
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V 0~70 Typical values TA=25oC.
APW7060 Symbol SUPPLY CURRENT 5VCC Supply Current 12VCC Supply Current UNDER VOLTAGE LOCKOUT Rising 5VCC Threshold Falling 5VCC Threshold Rising 12VCC Threshold Falling 12VCC Threshold OSCILLATOR FOSC Free Running Frequency Ramp Upper Threshold Ramp Lower Threshold VOSC VREF Ramp Amplitude Reference Voltage System Accuracy Over Line, Load Temperature REFERENCE VOLTAGE 2.85 0.95 VP-P 12VCC=12V 12VCC=12V 5VCC=5V 5VCC=5V 10.2 LGATE Open, FB2=DRIVE2 UGATE Open Parameter Test Conditions Unit
10.3 10.8
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V 0~70 Typical values TA=25oC.
APW7060 Symbol Parameter Test Conditions VUAGTE=1V VUGATE=1V VLGATE=1V VLGATE=1V VFB2=VREF-20mV, VDRIVE2=7V VFB2=VREF+20mV, VDRIVE2=3V DRIVE2 Open DRIVE2 Open Falling 11.7 0.01 BUILT-IN FEEDBACK COMPENSATION Gain First Pole Frequency First Zero Frequency UGATE Duty Range Input Current CONTROLLER GATE DRIVERS UGATE Source UGATE Sink LGATE Source LGATE Sink Dead Time Gain Gain Bandwidth Product Input Current DRIVE2 Source Current DRIVE2 Sink Current DRIVE2 Output High Voltage DRIVE2 Output Voltage UNDER-VOLTAGE PROTECTION UVFB FB/FB2 Under-Voltage Level FB/FB2 Under-Voltage Hysteresis SOFT-START SHUTDOWN Soft-Start Interval Shutdown Threshold Shutdown Hysteresis Rising 1.28 CL=0.5nF CL=1nF LINEAR CONTROLLER Unit
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Functional Description
LGATE (Pin This provides gate drive signal side MOSFET (Pin Signal power ground voltage levels measured with respect this pin. this ground plane through lowest impedance connection available. 5VCC (Pin This main bias supply DC/DC controller side MOSFET driver. Must closely decoupled (Pin 2,3). voltage this monitored undervoltage lockout (UVLO) purposes. apply voltage greater than 5.5V this pin. DRIVE2 (Pin This provides gate drive voltage linear regulator N-channel MOSFET pass transistor. also provides means compensating linear controller applications where user needs optimize regulator transient response. (Pin Connect this output (VOUT2) linear regulator proper sized resistor divider. voltage this regulated 0.8V VOUT2 determined using following formula VOUT2=0.8V where resistor connected from VOUT2 FB2, resistor connected from GND. This also monitored under-voltage events. Pulling holding above 1.28V shuts down both regulators. Releasing initiates soft-start both regulators. (Pin internal connection. (Pin This inverting input internal error amplifier buck controller. Connect this output (VOUT1) DC/DC converter proper sized resistor divider form complete feedback loop. VOUT1 determined using following formula VOUT1=0.8V where resistor connected from VOUT1 resistor connected from GND. This also monitored under-voltage events. 12VCC (Pin This provides supply voltage high side MOSFET driver linear controller. voltage greater than connected this pin. voltage this monitored undervoltage lockout (UVLO) purposes. UGATE (Pin This provides gate drive high-side MOSFET.
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Typical Characteristics
Reference Voltage Junction Temperature
0.816
Switching Frequency Junction Temperature
Switching Frequency, FOSC (kHz)
Reference Voltage, VREF
0.812 0.808 0.804 0.800 0.796 0.792 0.788 0.784
Junction Temperature (oC)
Junction Temperature (°C)
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Operating Waveforms
(Refer typical application circuit)
1.VOUT1 Load Transient Response IOUT IOUT1 slew rate ±10A/µS IOUT
VOUT1
IOUT
VOUT1
IOUT
VOUT1
VUGATE
VUGATE
IOUT1
IOUT1 IOUT1 VOUT1, 100mV/Div, Offset 1.25V VUGATE, 10V/Div, IOUT1, 5A/Div Time 5µS/Div 20MHz
VOUT1, 100mV/Div, Offset 1.25V VUGATE, 10V/Div, IOUT1, 5A/Div Time 5µS/Div 20MHz
VOUT1, 100mV/Div, Offset 1.25V IOUT1, 5A/Div Time 100µS/Div 20MHz
2.VOUT2 Load Transient Response IOUT 0.2A 0.2A IOUT2 slew rate ±3A/µS IOUT 0.2A IOUT 0.2A 0.2A IOUT 0.2A
VOUT2 VOUT2
VOUT2
IOUT2 IOUT2
0.2A
IOUT2 VOUT2, 50mV/Div, Offset 2.50V IOUT2, 1A/Div Time 1µS/Div 20MHz VOUT2, 50mV/Div, Offset 2.50V IOUT2, 1A/Div Time 50µS/Div 20MHz VOUT2, 50mV/Div, Offset 2.50V IOUT2, 1A/Div Time 1µS/Div 20MHz
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Operating Waveforms (Cont.)
Powering Soft-start Powering
+12V +12V
Powering
VOUT2 VOUT1
VOUT2 VOUT1
+5V, 1V/Div, +12V, 2V/Div, VOUT1, 1V/Div, VOUT2, 1V/Div, Time 1mS/Div 20MHz
+5V, 1V/Div, +12V, 2V/Div, VOUT1, 1V/Div, VOUT2, 1V/Div, Time 5mS/Div 20MHz
UGATE LGATE UGATE Rising
IOUT=10A VUGATE VUGATE
UGATE Falling
IOUT=10A
VLGATE
VLGATE
VUGATE, 2V/Div, VLGATE, 2V/Div, Time 50nS/Div 500MHz
VUGATE, 2V/Div, VLGATE, 2V/Div, Time 50nS/Div 500MHz
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Application Information
Soft Start Soft start initiated several ways. when input bias supply 5VCC 12VCC above 4.2V 10.2V respectively. other when part comes shutdown. both ways, soft start cycle will last 2ms. During this period, reference error amplifier controller linear controller will gradually slew final value 0.8V. This effectively will force both output voltages track this reference ramp rate. Hence both outputs will reach regulation same time. Figure illustrates this graphically. Maximum Output Voltage Linear Controller maximum drive voltage DRIVE2 determined applied voltage 12VCC pin. Since this drives external N-channel pass MOSFET, therefore maximum output voltage linear regulator dependent upon required gate-to-source voltage sustain load current. VOUT2MAX 12VCC VGSpass
Component Selection Guidelines Regulator Output Capacitor selection COUT determined required effective series resistance (ESR) voltage rating rather than actual capacitance requirement. Therefore select high performance capacitors that intended switching regulator applications. some applications, multiple capacitors have paralled achieve desired value. tantalum capacitors used, make sure they surge tested manufactures. doubt, consult capacitors manufacturer. Input Capacitor Selection input capacitor chosen based voltage rating current rating. reliable operation, select capacitor voltage rating least times higher than maximum input voltage. maximum current rating requirement approximately IOUT/2 where IOUT load current. During power input capacitors have handle large amount surge current. tantalum capacitors used, make sure they surge tested manufactures. doubt, consult capacitors manufacturer. high frequency decoupling, ceramic capacitor between 0.1uF connected between 5VCC ground pin.
www.anpec.com.tw
Soft-start Powering
+12V
VOUT2 VOUT1
+5V, 1V/Div, +12V, 2V/Div, VOUT1, 1V/Div, VOUT2, 1V/Div, Time 1mS/Div 20MHz
Figure Linear Regulator Transient Response Optimization linear regulator stable over load current. However, transient response further enhanced connecting network between DRIVE2 pin. Depending output capacitance load current application, value this network then varied. good starting point resistor value 6.8k 470pF capacitor.
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
APW7060
Application Information
Inductor Selection inductance inductor determined output voltage requirement. larger inductance, lower inductor's current ripple. This will translate into lower output ripple voltage. ripple current ripple voltage approximated
VOUTV
PUPPER Iout2 TC)(RDS(ON))D (0.5)(Iout)(VIN)(tsw)FS PLOWER Iout2 TC)(RDS(ON))(1-D) where IOUT load current temperature dependency RDS(ON) switching frequency switching interval duty cycle Note that both MOSFETs have conduction losses while upper MOSFET include additional transition loss.The switching internal, tsw, function reverse transfer capacitance CRSS. Figure illustrates switching waveform MOSFET. (1+TC) term factor temperature dependency RDS(ON) extracted from "RDS(ON) Temperature" curve power MOSFET. Linear Regulator Input/Output Capacitor Selection input capacitor chosen based voltage rating. Under load transient condition, input capacitor will momentarily supply required transient current. ceramic capacitor will sufficient most applications. output capacitor linear regulator chosen minimize droop during load transient condition. addition, capacitor chosen based voltage rating. Linear Regulator MOSFET Selection addition choosing pass MOSFET ability sustain load current requirement (see Maximum Output Voltage Linear Controller), another criteria efficiency heat removal. power dissipated MOSFET given Pdiss Iout (VIN VOUT2)
IRIPPLE
VOUT IRIPPLE where switching frequency regulator. There tradeoff exists between inductor's ripple current regulator load transient response time smaller inductor will give regulator faster load transient response expense higher ripple current vice versa. maximum ripple current occurs maximum input voltage. good starting point choose ripple current approximately maximum output current. Once inductance value been chosen, select inductor that capable carrying required peak current without going into saturation. some type inductors, especially core that make ferrite, ripple current will increase abruptly when saturates. This will result larger output ripple voltage. Regulator MOSFET Selection selection N-channel power MOSFETs determined RDS(ON), reverse transfer capacitance (CRSS) maximum output current requirement.The losses MOSFETs have components: conduction loss transition loss. upper lower MOSFET, losses approximately given following
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Application Information
where Iout maximum load current Vout2 nominal output voltage some applications, heatsink maybe required help maintain junction temperature MOSFET below maximum rating.
ground return must return combine
COUT terminal.
Capacitor CHFis improve noise performance
small ceramic capacitor will sufficient. Place this capacitor close drain
Inductor should connected closely
PHASE node.
Bypass capacitors, CBP, should placed close
5VCC 12VCC pins.
Voltage across drain source MOSFET
5VCC 5VCC
Time
12VCC
12VCC UGATE LGATE
Figure Switching waveform across MOSFET
Layout Considerations
high power switching regulator, correct layout important ensure proper operation regulator. general, interconnecting impedances should minimized using short, wide printed circuit traces. Signal power grounds kept separate finally combined using ground plane construction single point grounding. Figure illustrates layout, with bold lines indicating high current paths. Components along bold lines should placed close together. Below checklist your layout:
PHASE
APW7060
Figure Recommended Layout Diagram
Keep switching nodes (UGATE, LGATE
PHASE) away from sensitive small signal nodes since these nodes fast moving signals. There fore keep traces these nodes short possible.
Decoupling capacitor provides bulk capaci
tance needs placed close drain
Copyright ANPEC Electronics Corp. Rev. Mar., 2005 www.anpec.com.tw
APW7060
Package Information
(150mil)
Millimeters Min. 1.477 0.102 0.331 0.191 8.558 3.82 1.274 5.808 0.382 6.215 1.274 0.228 0.015 Max. 1.732 0.255 0.509 0.2496 8.762 3.999 Min. 0.058 0.004 0.013 0.0075 0.336 0.150
Inches Max. 0.068 0.010 0.020 0.0098 0.344 0.157 0.050 0.244 0.050
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Physical Specifications
Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material 90/10 63/37 SnPb Meets Specification RSI86-91, ANSI/J-STD-002 Category 2500 devices reel
(IR/Convection Reflow)
Critical Zone
Reflow Condition
p-up
Temperature
p-down Preheat
Peak
Classificatin Reflow Profiles
Profile Feature
Pb-Free Assembly Large Body Small Body 3°C/second max. 150°C 200°C 60-180 seconds 3°C/second 217°C 60-150 seconds +0/-5°C +0/-5°C 10-30 seconds 20-40 seconds
Sn-Pb Eutectic Assembly Large Body Small Body
Average ramp-up rate 3°C/second max. Preheat Temperature (Tsmin) 100°C Temperature (Tsmax) 150°C Time (min max)(ts) 60-120 seconds Tsmax Ramp-up Rate Tsmax Temperature(TL) 183°C Time (tL) 60-150 seconds Peak Temperature(Tp) +0/-5°C +0/-5°C Time within actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6°C/second max. minutes max. Time 25°C Peak Temperature
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
6°C/second max. minutes max.
www.anpec.com.tw
Note: temperatures refer topside package. Measured body surface.
APW7060
Reliability test program
Test item SOLDERABILITY HOLT Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape Reel Dimension
Application
SOP-14 (150mil)
330REF
13.0 100REF 0.50 1.50 (MIN)
16.5REF
16.0 2.10
0.3±0.05
1.75
(mm)
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
APW7060
Cover Tape Dimensions
Application SOP- Carrier Width Cover Tape Width 21.3 Devices Reel 2500
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. Mar., 2005
www.anpec.com.tw
Other recent searches
SG1316 - SG1316 SG1316 Datasheet
RF1601T2D - RF1601T2D RF1601T2D Datasheet
NECW021T - NECW021T NECW021T Datasheet
LBN7049 - LBN7049 LBN7049 Datasheet
HDS2V2 - HDS2V2 HDS2V2 Datasheet
CER0233C - CER0233C CER0233C Datasheet
ARS-2022S - ARS-2022S ARS-2022S Datasheet
AEC-7763SL - AEC-7763SL AEC-7763SL Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
