Advanced Dual Linear Power Control Regulated Voltage provided Swi

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Advanced Dual Linear Power Control Regulated Voltage provided Swi

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APW7025
Advanced Dual Linear Power Control
Regulated Voltage provided Switching Power VTT(1.25V) Linear1 Regulator FBVDDQ(2.5V) Linear2 Regulator NVVDD(2.05V)
General Description
APW7025 integrates controller Dual linear controller, well monitoring protection functions into single package which provides three controlled power outputs with over-voltage over-current protections. controller regulates reference voltage with synchronous-rectified buck converter. linear controller regulates power microprocessor core voltage Memory Voltage. precision reference voltage-mode control provide static regulation. linear controller drives external N-channel MOSFET provide adjustable voltage. APW7025 monitors output voltages single Power Good signal issued when Voltage within 1.25V setting other output levels above their under-voltage thresholds. Additional built-in over-voltage protection output uses lower MOSFET prevent output voltages above 115% 1.25V setting. over-current function monitors output current using voltage drop across upper MOSFET's RDS(ON) eliminating need current sensing resistor.
Simple Single-Loop Control Design Voltage-Mode Control Excellent Output Voltage Regulation Output: Linear Output:
Fast Transient Response High-Bandwidth Error Amplifier Full 100% Duty Ratio
Power-Good Output Voltage Monitor Over-Voltage Over-Current Fault Monitors Small Converter Size
Constant Frequency Operation(200kHz) Programmable Oscillator from 50kHz 1MHz Reduce External Component Count
Description Applications
UGATE PHASE LGATE PGND OCSET VSEN1 COMP VSEN3 DRIVE3 VAUX
DRIVE2
Motherboard Power Regulation Computers Low-Voltage Distributed Power Supplies Card Power Regulation
PGOOD VSEN2 FAULT
SOP24
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.P.1 Mar., 2001 www.anpec.com.tw
APW7025
Ordering Information
APW7025
Handling Code Temp. Range Package Code Package Code Temp. Range 70°C Handling Code Tube
Tape Reel
Block Diagram
VSEN3 VAUX
Power-on Reset (POR)
VSEN1
OCSET
1.10
DRIVE3
0.90
VAUX
VSEN2 DRIVE2
Absolute Maximum Ratings
Symbol TSTG Supply Voltage Input Output Voltage Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Temperature
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
0.75
200µA
PGOOD
1.26V
LINEAR UNDERVOLTAGE
1.15
INHIBIT FAULT
SOFT START FAULT LOGIC
DRIVER1
UGATE INHIBIT
PHASE
ERROR AMP1
COMP1 PWM1
GATE CONTROL SYNCH DRIVE
1.5V
OSCILLATOR
LGATE PGND
1.25V 28µA 4.5V
FAULT
COMP
Parameter
Rating -0.3 +0.3 +150 seconds
Unit
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APW7025
Thermal Characteristics
Symbol Parameter Thermal Resistance Free SOIC SOIC (with 3in2 Copper) Value Unit °C/W
Electrical Characteristics
(Recommended operating conditions Unless otherwise noted) Refer Block Simplified Power System Diagrams Typical Application Schematic
Symbol Supply Current Nominal Supply Current UGATE, LGATE, DRIVE2, DRIVE3 open Parameter Test Conditions APW7025 Typ. Max. Unit
Min.
Power-on Reset Rising Threshold Vocset=4.5V Falling Threshold Vocset=4.5V Rising VAUX Threshold Vocset=4.5V VAUX Threshold Hysteresis Vocset=4.5V Rising VOCSET Threshold Oscillator FOCS Free Running Frequency Open Open VOSC Ramp Amplitude Bandgap Reference Voltage accuracy Bandgap Reference Voltage Bandgap Reference Tolerance Linear Regulators (OUT2, OUT3) Regulation (All Linears) Output Drive Current (All Liners) VAUX-VDRIVE >0.6V Synchronous Controller Error Amplifier Gain GBWP Gain-Bandwidth Product Slew Rate COMP=10pF Controller Gate Driver IUGATE UGATE Source VCC=12V, VUGATE RUGATE UGATE Sink VUGATE1-PHASE ILGATE LGATE Source VCC=12V, VLGATE RLGATE LGATE Sink VLGATE=
10.4 1.26
VP-P V/µs
-1.0 1.265 -2.5
+1.0 +2.5
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
www.anpec.com.tw
APW7025
Electrical Characteristics Cont.
Symbol Parameter Test Conditions APW7025 Typ. Max. Unit
Min.
Protection VSEN1 Over-Voltage (VSEN1/DACOUT) IOVP FAULT Souring Current IOCSET OCSET Current Source Soft Start Current Power Good VSEN1 Upper Threshold (VSEN1/DACOUT) VSEN1 Under Voltage (VSEN1/DACOUT) VSEN1 Hysteresis (VSEN1 /DACOUT) VPGOOD PGOOD Voltage
VSEN1 Rising VFAULT/RT=2.0V VOCSET= 4.5VDC
VSEN1 Rising VSEN1 Rising Upper /Lower Threshold IPGOOD= -4mA
Functional Description
(Pin Provide bias supply this pin. This also provides gate bias charge MOSFETs controlled voltage this monitored Power-On Reset (POR) purposes. DRIVE2 (Pin FAULT (Pin Connect this gate external MOSFET. This provides drive NVVDD regulator's pass transistor. PGOOD (Pin PGOOD open collector output used indicate status output voltages. This pulled when synchronous regulator output within ±10% DACOUT reference voltage when other outputs below their undervoltage thresholds. VSEN2 (Pin Connect this resistor divider linear This provides oscillator switching frequency adjustment. placing resistor (RT) from this GND, nominal 200kHz switching frequency increased according following equation: =200kHz GND) Conversely, connecting resistor from this reduces switching frequency according following equation: regulator (NVVDD) output voltage. (Pin Connect capacitor from this ground. This capacitor, along with internal 28µA current source, sets soft-start interval converter.
=200kHz 12V)
Nominally, voltage this 1.26V. event over-voltage over-current condition, this
Copyright ANPEC Electronics Corp. Rev. Mar., 2001
www.anpec.com.tw
APW7025
Functional Description Cont.
internally pulled VCC. VAUX (Pin This provides boost current linear regulator's output drives event bipolar transistors (instead N-channel MOSFETs) employed pass elements. voltage this monitored power-on reset purposes. (Pin Signal ground voltage levels measured with respect this pin. DRIVE3 (Pin Connect this gate external MOSFET. This provides drive FBVDDQ regulator's pass transistor. VSEN3 (Pin Connect this resistor divider linear regulator (FBVDDQ) output voltage. COMP (Pin COMP available external pins converter error amplifier. inverting input error amplifier. Similarly, COMP error amplifier output. These pins used compensate voltage-mode control feedback loop synchronous converter. VSEN1 (Pin This connected converter's output voltage. PGOOD comparator circuits this signal report output voltage status over- voltage protection. OCSET (Pin Connect resistor from this drain respective upper MOSFET. This resistor, internal 200µA current source, upper MOSFET's onresistance converter overCopyright ANPEC Electronics Corp. Rev. Mar., 2001 www.anpec.com.tw
current trip point. over-current trip cycles softstart function. voltage this monitored power-on reset (POR) purposes pulling this with open drain device will shutdown PGND (Pin This power ground connection. synchronous converter's lower MOSFET source this pin. LGATE (Pin Connect LGATE converter's lower MOSFET gate. This provides gate drive lower MOSFET. PHASE (Pin Connect PHASE converter's upper MOSFET source. This represents gate drive return current path used monitor voltage drop across upper MOSFET over-current protection. UGATE (Pin Connect UGATE converter's upper MOSFET gate. This provides gate drive upper MOSFET.
APW7025
Typical Characteristics
+5VIN +3.3VIN VOUT2 Linear Controller APW7025 VOUT3 Linear Controller PWM1 Controller VOUT1
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., 2001
www.anpec.com.tw

Advanced Dual Linear Power Control Regulated Voltage provided Swi

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