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APW7058
Synchronous Buck PWM and Linear Controllers
Features
*
Provides Two Regulated Voltages - One Synchronous-Rectified Buck PWM Controller - One Linear Controller
General Description
The APW7058 integrates one synchronous-rectified Buck PWM controller and one linear controller to provide two regulated voltages for graphics cards and other embedded processor applications. The PWM controller which drives dual N-channel MOSFETs uses fixed 600kHz frequency, voltage-mode PWM control and integrates power-on-reset(POR), built-in soft-start, output under-voltage monitoring and shutdown functions into a single chip. The linear controller which drives a N-channel MOSFET bypass transistor allows users to optimize the transient response by external components. The POR circuit with hysteresis monitors both 5VCC and 12VCC supply voltages to start up/shutdown the IC at power-on/off. An internal 0.8V temperature-compensated reference is designed to meet the low output voltage requirement for further applications. The built-in soft-start function sets the soft-start interval to prevent the output voltages from overshoot as well as limiting the input currents. The under-voltage protections monitor the voltages at FB and FB2 for short-circuit protection. The under-voltage protections cycle the soft-start function until 3 times of UVP events are happened. Pulling and holding the FB2 pin above 1.28V to disable the both controllers.
*
Low Reference Voltage for Further Applications - Both Controllers : 0.8V 2% Over Temperature
*
Both Controllers Drive N-Channel MOSFETs - PWM Controller Drives Dual N-Channel MOSFETs - Linear Controller Drives N-Channel MOSFET
*
Built-in PWM Feedback Compensation - No Steady-State Error - Voltage-Mode PWM Control - Full 0~100% Duty Ratio - Fast Transient Response
* Adjustable Outputs by External Resistor Dividers * Under-Voltage Monitoring on Both Controllers * Small Converter Size
- 600kHz Constant Switching Frequency - Built-In Soft-Start - Simple SO-8 Package
* *
Shutdown Control Lead Free Available (RoHS Compliant)
Pin Description
Applications
* * *
Motherboard
12VCC UGATE GND
1 2 3 4
8 7 6 5
FB FB2 DRIVE2 5VCC
Graphics Cards
LGATE
12V, 5V and 3.3V Inputs DC-DC Converter
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 1 www.anpec.com.tw
APW7058
Ordering and Marking Information
APW 7058
L e ad F re e C od e H a n d lin g C od e T e m p . R a n ge P a c k a g e C od e P a c k a g e C od e K : SOP - 8 O p e ra tin g J u n c tio n T e m p . R an g e C : 0 to 70 C H a n d lin g C od e TU : Tube T R : T a p e & R e el L e ad F re e C od e L : L ea d F ree D e v ic e B la nk : O rig in a l D e vic e
APW 7058 K :
APW 7058 XXXXX
X X X X X - D a te C o de
Notes ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classification at lead-free peak reflow temperature.
Block Diagram
5VCC 12VCC
Power On Reset
PO R PW M
UGATE
0.5V
UVP1
Soft-Start and Fault Logic
Gate Control
5VC C
LGATE
Inhibit / Soft-Start
UVP2
FB
Error Am plifier VREF 0.8V
COMP
FB2
0.5V 12VC C
Shutdow n
1.28V
Linear C ontroller
DRIVE2
Oscillator
FOSC 600kH z
GND
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Typical Application
R4
+12V
C8 1uF
5 1 12VCC 5VCC
+5V
C1 2.2 1uF C4 4.7uF R5 0 Q1 L1 1uH
L2 1uH
VIN2 +3.3V
C10 470uF Q3 R9 0
VIN1 +3.3V
C2, C3 2 x 470uF
UGATE 6 DRIVE2
2
R10 27k C9 33pF
4 LGATE
R6 0 Q2
D1 R1 590
VOUT1 +1.263V C5, C6 /10A
2 x 470uF
U1 APW7058
FB 7 FB2 8
VOUT2 +2.5V/3A
C11 470uF
R7 2.37k
R8 1.13k
GND 3
R2 1.02k
C7 68nF
R3 0
Q1, Q2 : APM2014N UC D1 : 3A Schcottky Diode Q3 : APM2055N UC C2, C3, C5, C6, C10, C11 : 470F/6.3V, ESR=30m
Absolute Maximum Ratings
Symbol 5VCC 12VCC Parameter 5VCC Supply Voltage (5VCC to GND) 12VCC Supply Voltage (12VCC to GND) UAGTE, DRIVE2 to GND LGATE, FB, FB2 to GND Maximum Junction Temperature TSTG TSDR VESD Storage Temperature Maximum Soldering Temperature, 10 Seconds Minimum ESD Rating (Human body model) Rating -0.3 ~ 7 -0.3 ~ 15 -0.3 ~ 12VCC -0.3 ~ 5VCC 150 -65 ~ 150 300 2 Unit V V V V
o o o
C C C
KV
Thermal Characteristics
Symbol JA Parameter Junction-to-Ambient Resistance in free air (SOP-8)
3
Value 160
Unit
o
C/W
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Recommended Operating Conditions
Symbol 5VCC 12VCC VOUT1 VIN1 VOUT2 VIN2 TA TJ 5VCC Supply Voltage 12VCC Supply Voltage Output Voltage of the Buck converter Input Voltage of the Buck converter Output Voltage of the Linear Regulator Input Voltage of the Linear Regulator Ambient Temperature Junction Temperature Parameter
(Note)
Range 5 5% 12 10% 0.8 ~ 3.3 3.3/5 5% 0.8 ~ 3.3 3.3/5 5% 0 ~ 70 0 ~ 125
Unit V V V V V V
o o
C C
Note : Refer to the typical application circuit
Electrical Characteristics
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical values are at TA=25oC. APW7058 Unit Symbol Parameter Test Conditions Min Typ Max
SUPPLY CURRENT ICC 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 and Temperature -2 REFERENCE VOLTAGE 0.8 +2 V % 550 600 2.85 0.95 1.9 650 kHz V V VP-P 12VCC=12V 12VCC=12V 5VCC=5V 5VCC=5V 4.0 3.5 9.6 9.3 4.2 3.7 9.7 4.5 3.9 10.2 V V V V LGATE Open, FB2=DRIVE2 UGATE Open 2.5 2.5 mA mA
10.3 10.8
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over 5VCC=5V, 12VCC=12V and TA= 0~70 oC. Typical values are at TA=25oC.
APW7058 Symbol Parameter Test Conditions Min Typ 75 10 1 0 100 0.1 VUAGTE=1V VUGATE=1V VLGATE=1V VLGATE=1V 0.6 7.3 0.6 1.8 50 78 1.6 1 0.1 VFB2=VREF-20mV, VDRIVE2=7V VFB2=VREF+20mV, VDRIVE2=3V DRIVE2 Open DRIVE2 Open FB or FB2 Falling 9.8 2.6 11.7 0.01 0.5 15 Max BUILT-IN PWM FEEDBACK COMPENSATION DC Gain FP FZ First Pole Frequency First Zero Frequency UGATE Duty Range FB Input Current PWM CONTROLLER GATE DRIVERS UGATE Source UGATE Sink LGATE Source LGATE Sink TD Dead Time DC Gain Gain Bandwidth Product FB Input Current DRIVE2 Source Current DRIVE2 Sink Current DRIVE2 Output High Voltage DRIVE2 Output Low Voltage UNDER-VOLTAGE PROTECTION UVFB FB/FB2 Under-Voltage Level FB/FB2 Under-Voltage Hysteresis SOFT-START AND SHUTDOWN TSS Soft-Start Interval FB2 Shutdown Threshold FB2 Shutdown Hysteresis FB2 Rising 2 1.28 30 mS V mV V mV CL=0.5nF CL=1nF LINEAR CONTROLLER dB MHz A mA mA V V A A nS dB Hz kHz % A Unit
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Functional Pin Description
12VCC (Pin 1) Connect this pin to 12V supply voltage. It provides bias voltage for the high-side MOSFET driver and the linear controller. The voltage at this pin is monitored for Power-On-Reset purposes. UGATE (Pin 2) Connect this pin to the gate of the high-side MOSFET. This pin provides gate drive for the MOSFET. GND (Pin 3) Signal and power ground for the IC. Putting vias to ground planet directly and close to GND pins minimizes noises. LGATE (Pin 4) Connect this pin to the gate of the low-side MOSFET. This pin provides gate drive for the MOSFET. 5VCC (Pin 5) Connect this pin to a 5V supply voltage via a RC filter (2.2 and 1F are recommended). This pin provides the bias for the control circuitry and the lowside MOSFET driver. The voltage at this pin is monitored for Power-On-Reset purposes. DRIVE2 (Pin 6) Connect this pin to the gate of an external N-Channel MOSFET transistor. This pin provides the gate voltage for the linear regulator pass transistor. It also provides a means of compensating the linear controller for applications where the user needs to optimize the regulator transient response. FB2 (Pin 7) Connect this pin to the output (VOUT2) of the linear regulator via a proper sized resistor divider. The voltage at this pin is regulated to 0.8V and the VOUT2 is determined using the following formula : R7 VOUT2=0.8V x (1+ R8 ) where R7 is the resistor connected from VOUT2 to FB2, and R8 is the resistor connected from FB2 to GND. This pin is also monitored for under-voltage events. Pulling and holding FB2 above 1.28V shuts down both regulators. Releasing FB2 initiates soft-start on both regulators. FB (Pin 8) This pin is the inverting input of the internal error amplifier. Connect this pin to the output (VOUT1) of the Buck converter via a proper sized resistor divider to provide feedback loop of the Buck converter. The VOUT1 is determined using the following formula : R1 VOUT1=0.8V x (1+ R2 ) where R1 is the resistor connected from VOUT1 to FB, and R2 is the resistor connected from FB to GND. This pin is also monitored for under-voltage events.
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Typical Characteristics
Reference Voltage vs. Junction Temperature
0.816 650
Switching Frequency vs. Junction Temperature
Switching Frequency, FOSC (kHz)
640 630 620 610 600 590 580 570 560 550 -50 -25 0 25 50 75 100 125 150
Reference Voltage, VREF (V)
0.812 0.808 0.804 0.800 0.796 0.792 0.788 0.784 -50 -25 0 25 50 75 100 125 150
Junction Temperature (oC)
Junction Temperature (C)
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Operating Waveforms
(Refer to the typical application circuit)
1.VOUT1 Load Transient Response : IOUT = 0A -> 10A -> 0A - IOUT1 slew rate = 10A/S IOUT = 0A -> 10A
VOUT1
IOUT = 0A -> 10A -> 0A
VOUT1
IOUT = 10A -> 0A
VOUT1
VUGATE
10A
VUGATE
IOUT1
0A
IOUT1 IOUT1 Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ch2 : VUGATE, 10V/Div, DC Ax1 : IOUT1, 5A/Div Time : 5S/Div BW = 20MHz
Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ch2 : VUGATE, 10V/Div, DC Ax1 : IOUT1, 5A/Div Time : 5S/Div BW = 20MHz
Ch1 : VOUT1, 100mV/Div, DC, Offset = 1.25V Ax1 : IOUT1, 5A/Div Time : 100S/Div BW = 20MHz
2.VOUT2 Load Transient Response : IOUT = 0.2A -> 3A -> 0.2A - IOUT2 slew rate = 3A/S IOUT = 0.2A -> 3A IOUT = 0.2A -> 3A -> 0.2A
VOUT2 VOUT2
3A
IOUT = 3A -> 0.2A
VOUT2
IOUT2 IOUT2
0.2A
IOUT2
Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 1S/Div BW = 20MHz
Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 50S/Div BW = 20MHz
Ch1 : VOUT2, 50mV/Div, DC, Offset = 2.50V Ax1 : IOUT2, 1A/Div Time : 1S/Div BW = 20MHz
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Operating Waveforms (Cont.)
3. Powering ON / OFF Soft-start at Powering ON
+12V +5V +12V +5V
Powering OFF
VOUT2 VOUT1
VOUT2 VOUT1
Ch1 : +5V, 1V/Div, DC Ch2 : +12V, 2V/Div, DC Ch3 : VOUT1, 1V/Div, DC Ch4 : VOUT2, 1V/Div, DC Time : 1mS/Div BW = 20MHz
Ch1 : +5V, 1V/Div, DC Ch2 : +12V, 2V/Div, DC Ch3 : VOUT1, 1V/Div, DC Ch4 : VOUT2, 1V/Div, DC Time : 5mS/Div BW = 20MHz
4. UGATE and LGATE UGATE Rising
IOUT=10A VUGATE VUGATE
UGATE Falling
IOUT=10A
VLGATE
VLGATE
Ch1 : VUGATE, 2V/Div, DC Ch2 : VLGATE, 2V/Div, DC Time : 50nS/Div BW = 500MHz
Ch1 : VUGATE, 2V/Div, DC Ch2 : VLGATE, 2V/Div, DC Time : 50nS/Div BW = 500MHz
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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APW7058
Packaging Information
SOP-8 pin ( Reference JEDEC Registration MS-012)
E
H
e1 D
e2
A1
A
1 L
0.004max.
Dim A A1 D E H L e1 e2 1
Mi ll im et er s Min . 1. 35 0. 10 4. 80 3. 80 5. 80 0. 40 0. 33 1. 27B S C 8 Max . 1. 75 0. 25 5. 00 4. 00 6. 20 1. 27 0. 51 Min. 0. 053 0. 004 0. 189 0. 150 0. 228 0. 016 0. 013
0.015X45
Inche s Max . 0. 069 0. 010 0. 197 0. 157 0. 244 0. 050 0. 020 0. 50B S C 8
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APW7058
Physical Specifications
Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. 2500 devices per reel
Reflow Condition
TP
(IR/Convection or VPR Reflow)
tp Critical Zone T L to T P
Ram p-up
Temperature
TL Tsm ax
tL
Tsm in Ram p-down ts Preheat
25
t 25 C to Peak
Classificatin Reflow Profiles
Profile Feature
Tim e
Pb-Free Assembly Large Body Small Body 3C/second max. 150C 200C 60-180 seconds 3C/second max 217C 60-150 seconds 245 +0/-5C 250 +0/-5C 10-30 seconds 20-40 seconds
Sn-Pb Eutectic Assembly Large Body Small Body
Average ramp-up rate 3C/second max. (TL to TP) Preheat - Temperature Min (Tsmin) 100C - Temperature Mix (Tsmax) 150C - Time (min to max)(ts) 60-120 seconds Tsmax to TL - Ramp-up Rate Tsmax to TL - Temperature(TL) 183C - Time (tL) 60-150 seconds Peak Temperature(Tp) 225 +0/-5C 240 +0/-5C Time within 5C of actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6C/second max. 6 minutes max. Time 25C to Peak Temperature
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005 11
6C/second max. 8 minutes max.
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Note: All temperatures refer to topside of the package. Measured on the body surface.
APW7058
Reliability test program
Test item SOLDERABILITY HOLT PCT TST ESD 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 78 Description 245C , 5 SEC 1000 Hrs Bias @ 125 C 168 Hrs, 100 % RH , 121C -65C ~ 150C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA
Carrier Tape & Reel Dimension
t Po P P1 D
E
F W
Ao
D1
Ko
T2
J C A B
T1
Application
SOP-8 Application SOP-8
A 3301 F 5.5 0.1
B 62 1.5
C 12.75 + 0.1 5
J 2 + 0.5
T1 12.4 +0.2 P1 2.0 0.1
T2 2 0.2 Ao 6.4 0.1
W 12 + 0.3 - 0.1 Bo 5.2 0.1
P 8 0.1
E 1.75 0.1
D D1 Po 1.550.1 1.55+ 0.25 4.0 0.1
Ko t 2.1 0.1 0.30.013
(mm)
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APW7058
Cover Tape Dimensions
Application SOP- 8 Carrier Width 12 Cover Tape Width 9.3 Devices Per Reel 2500
Customer Service
Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. A.3 - Mar., 2005
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