Synchronous Buck Linear Controllers Provides Regulated Voltages S

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Synchronous Buck Linear Controllers Provides Regulated Voltages S

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APW7058
Synchronous Buck Linear Controllers
Provides Regulated Voltages Synchronous-Rectified Buck
Controller Linear Controller
General Description
APW7058 integrates synchronous-rectified Buck controller linear controller provide regulated voltages graphics cards other embedded processor applications. controller which drives dual N-channel MOSFETs uses fixed 600kHz frequency, voltage-mode control integrates power-on-reset(POR), built-in soft-start, output under-voltage monitoring shutdown functions into single chip. linear controller which drives N-channel MOSFET bypass transistor allows users optimize transient response external components. circuit with hysteresis monitors both 5VCC 12VCC supply voltages start up/shutdown power-on/off. internal 0.8V temperature-compensated reference designed meet output voltage requirement further applications. built-in soft-start function sets soft-start interval prevent output voltages from overshoot well limiting input currents. under-voltage protections monitor voltages short-circuit protection. under-voltage protections cycle soft-start function until times events happened. Pulling holding above 1.28V disable both controllers.
Reference Voltage Further Applications Both Controllers 0.8V Over Temperature
Both Controllers Drive N-Channel MOSFETs Controller Drives Dual N-Channel
MOSFETs Linear Controller Drives N-Channel MOSFET
Built-in Feedback Compensation Steady-State Error Voltage-Mode Control
Full 0~100% Duty Ratio
Fast Transient Response
Adjustable Outputs External Resistor Dividers Under-Voltage Monitoring Both Controllers Small Converter Size 600kHz Constant Switching Frequency
Built-In Soft-Start Simple SO-8 Package
Shutdown Control
Description
Applications
12VCC
DRIVE2 5VCC
Motherboard Graphics Cards 12V, 3.3V Inputs DC-DC Converter
UGATE LGATE
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. Jun., 2003 www.anpec.com.tw
APW7058
Ordering Marking Information
7058
ange ackage Tube Tape
7058
7058 XXXXX
Block Diagram
5VCC 12VCC
Power Reset
UGATE
0.5V
UVP1
Soft-Start Fault Logic
Gate Control
LGATE
Inhibit Soft-Start
Error plifier VREF 0.8V
COMP
UVP2 0.5V 12VC
Shutdow
1.28V
Linear ontroller
DRIVE2
Oscillator
600kH
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
Typical Application
+12V VIN2 +3.3V
470uF
12VCC 5VCC
4.7uF
VIN1 +3.3V
470uF
UGATE DRIVE2
33pF
LGATE
VOUT1 +1.263V /10A
470uF
APW7058
VOUT2 +2.5V/3A
470uF
2.37k
1.13k
1.02k
68nF
APM2014N Schcottky Diode APM2055N C10, 470µF/6.3V, ESR=30m
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-8)
Value
Unit
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
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. APW7058 Unit Symbol Parameter Test Conditions
SUPPLY CURRENT 5VCC Supply Current 12VCC Supply Current POWER-ON RESET 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 5VCC 10.2 LGATE Open, FB2=DRIVE2 UGATE Open
10.3 10.8
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V 0~70 Typical values TA=25oC.
APW7058 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. Jun., 2003
www.anpec.com.tw
APW7058
Functional Description
12VCC (Pin Connect this supply voltage. provides bias voltage high-side MOSFET driver linear controller. voltage this monitored Power-On-Reset purposes. UGATE (Pin Connect this gate high-side MOSFET. This provides gate drive MOSFET. (Pin Signal power ground Putting vias ground planet directly close pins minimizes noises. LGATE (Pin Connect this gate low-side MOSFET. This provides gate drive MOSFET. 5VCC (Pin Connect this supply voltage filter (2.2 recommended). This provides bias control circuitry lowside MOSFET driver. voltage this monitored Power-On-Reset purposes. DRIVE2 (Pin Connect this gate external N-Channel MOSFET transistor. This provides gate voltage linear regulator 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 This inverting input internal error amplifier. Connect this output (VOUT1) Buck converter proper sized resistor divider provide feedback loop Buck converter. VOUT1 determined using following formula VOUT1=0.8V where resistor connected from VOUT1 resistor connected from GND. This also monitored under-voltage events.
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
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. Jun., 2003
www.anpec.com.tw
APW7058
Operating Waveforms
(Refer typical application circuit)
1.VOUT1 Load Transient Response IOUT IOUT1 slew rate ±10A/µS IOUT
VOUT1 VUGATE
IOUT
VOUT1
IOUT
VOUT1
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
VOUT2 VOUT2
IOUT 0.2A
VOUT2
IOUT2 IOUT2 IOUT2
0.2A
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. Jun., 2003
www.anpec.com.tw
APW7058
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. Jun., 2003
www.anpec.com.tw
APW7058
Packaging Information
SOP-8 Reference JEDEC Registration MS-012)
0.004max.
Min.
0.015X45
Inche
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
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)
Reflow Condition
temperature
Reference JEDEC Standard J-STD-020A APRIL 1999
Peak temperature
183°C Pre-heat temperature
Time
Classification Reflow Profiles
Convection Convection °C/second max. seconds max. seconds seconds +5/-0 +5/-0 /second max. minutes max. /second max.
Average ramp-up rate(183 Peak) Preheat temperature Temperature maintained above Time within actual peak temperature Peak temperature range Ramp-down rate Time peak temperature
seconds 215~ +5/-0 /second max.
Package Reflow Conditions
pkg. thickness 2.5mm bags Convection +5/-0 215-219 IR/Convection +5/-0 pkg. thickness 2.5mm pkg. volume pkg. thickness 2.5mm pkg. volume Convection +5/-0 +5/-0 IR/Convection +5/-0
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
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-8 Application SOP-8
330±1
12.75
12.4 +0.2
5.2±
1.75±
1.55±0.1 1.55+ 0.25
2.1± 0.3±0.013
(mm)
Copyright ANPEC Electronics Corp. Rev. Jun., 2003
www.anpec.com.tw
APW7058
Cover Tape Dimensions
Application SOP- Carrier Width Cover Tape Width 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. Jun., 2003
www.anpec.com.tw

Synchronous Buck Linear Controllers Provides Regulated Voltages S

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