APW7065C Datasheet PDF - Anpec Electronics Coropration

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APW7065C
Anpec Electronics Coropration

Part Number APW7065C
Description Synchronous Buck PWM Controller
Page 19 Pages


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APW7065C
Synchronous Buck PWM Controller
Features
Single 12V Power Supply Required
Fast Transient Response
- 0~90% Duty Ratio
0.8V Reference with 1% Accuracy
Shutdown Function by Controlling COMP
PinVoltage
Internal Soft-Start (1.7ms) Function
Voltage Mode PWM Control Design
Under-Voltage Protection
Over-Current Protection
- Sense Low Side MOSFET’s RDS(ON)
300kHz Fixed Switching Frequency
SOP-8 Package
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
12V
VIN
APW7065C
L VOUT
Pin Configuration
General Description
The APW7065C uses fixed 300kHz switching f requency,
voltage mode, synchronous PWM controller which drives
dual N-channel MOSFE Ts. The device integrates the
control, monitoring and protection functions into a
singl e package, provides one controlled power outp ut
with under-voltage and over-current protections.
The AP W7065C provides excellent regulation for
output load variation. The internal 0.8V temperature-com-
pensated reference voltage is designed to meet the re-
quirement of low output voltage applications. An built-in
digital soft-start with fixed soft-start interval prevents the
output voltage from overshoot as well as limiting the in-
put current.
The AP W70 65C with excellent protection functions:
POR, OCP and UVP. The Power-On-Reset (POR) cir-
cuit can monitor VCC supply voltage exceeds its thresh-
old voltage while the controller is running, and a built-in
digital soft-start provides output with controlled voltage
rise. The Over-Current Protection (OCP) monitors the
output current by using the voltage drop across the lower
MOSFET’s R ,DS(ON) comparing with internal VOCP (0.29V),
when the output current reaches the trip point, the IC
shuts off the converter and initiates a new soft-start
process. After two over-current events are counted,
the device turns off both high-side and low-side
MOSFE Ts and the converter's output is latched to be
floating. It requires a POR of VCC to restart. The Under-
Voltage Protection (UVP) monitors the voltage of FB pin
for short-circuit protection, when the V FB is less than
50% of V REF (0.4V) , the controller will shutdown the IC
directly.
BOOT 1
UGATE 2
GND 3
LGATE 4
8 PHASE
7 COMP
6 FB
5 VCC
SOP-8
(APW7065C)
Applications
Graphics Card
Mother Board
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.2 - Mar., 2008
1
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APW7065C
Ordering and Marking Information
APW7065C
Assembly Material
Handling Code
Temp. Range
Package Code
Package Code
K : SOP-8
Operating Ambient Temp. Range
E : -20 to 70°C
Handling Code
TR : Tape & Reel
Assembly Material
L : Lead Free Device G : Halogen and Lead Free Device
APW7065C K :
APW7065
XXXXX C
XXXXX - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. 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. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VCC VCC to GND
-0.3 ~ 16
V
VBOOT
BOOT to PHASE
-0.3 ~ 16
V
VUGATE
UG ATE to PHASE
<400ns pulse width
>400ns pulse width
-5 ~ VBOOT+5
-0.3 ~ VBOOT+0.3
V
VLGATE
LG ATE to GND
<400ns pulse width
>400ns pulse width
-5 ~ VCC+5
-0.3 ~ VCC+0.3
V
VPHASE
PHASE to GND
<200ns pulse width
>200ns pulse width
-10 ~ 30
-0.3 ~ 16
V
VCOMP, VFB
COMP, FB to GND
-0.3 ~ 7
V
TJ Junction Temperature Range
-20 ~ 150
oC
TSTG
Storage Temperature Range
-65 ~ 150
oC
TSDR
Maximum Lead Soldering Temperature, 10 Seconds
260 oC
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Thermal Characteristics
Symbol
θJA
Parameter
Junction-to-Ambient Thermal Resistance in Free Air
SOP -8
Value
160
Unit
oC/W
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Mar., 2008
2
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APW7065C
Recommended Operating Conditions
Symbol
VCC
VOUT
VIN
IOUT
TA
TJ
Parameter
VCC Supply Voltage
Converter Output Voltage
Converter Input Voltage
Converter Output Current
Ambient Temperature Range
Junction Temperature Range
Range
10.8 ~ 13.2
0.8 ~ 5
2.9 ~ 13.2
0 ~ 25
-20 ~ 70
-20 ~ 125
Unit
V
V
V
A
oC
oC
Electrical Characteristics
Unless otherswise specified, these specifications apply over VCC=12V, and TA =-20~70oC. Typlcal values are at TA=25oC.
Symbol
Parameter
SUPPLY CURRENT
IVCC VCC Nominal Supply Current
VCC Shutdown Supply Current
POWER-ON-RESET
Rising VCC Threshold
Falling VCC Threshold
COMP Shutdown Threshold
COMP Shutdown Hysteresis
OSCILLATOR
FOSC Free Running Frequency
VOSC Ramp Amplitude
REFERENCE VOLTAGE
VREF Reference Voltage
Accuracy
ERROR AMPLIFIER
Gain Open Loop Gain
GBWP Open Loop Bandwidth
SR Slew Rate
FB Input Current
VCOMP
VCOMP
ICOMP
ICOMP
COMP High Voltage
COMP Low Voltage
COMP Source Current
COMP Sink Current
Test Conditions
UGATE and LGATE Open
UGATE, LGATE = GND
Measured at FB Pin
TA =-20~70°C
RL=10K, CL=10pF(Note2)
RL=10K, CL=10pF(Note2)
RL=10K, CL=10pF(Note2)
VFB = 0.8V(Note2)
VCOMP=2V
VCOMP=2V
APW7065C
Min Typ Max
Unit
- 5 10 mA
- 1 2 mA
9 9.5 10
7.5 8 8.5
- 1.2 -
- 0.1 -
V
V
V
V
270 300 345 kHz
- 1.6 - VP-P
- 0.8 -
-1.0 - +1.0
V
%
- 88 - dB
- 15 - MHz
- 6 - V/µs
- 0.1 1
µA
- 5.5 -
V
-0- V
- 5 - mA
- 5 - mA
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Mar., 2008
3
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APW7065C
Electrical Characteristics (Cont.)
Unless otherswise specified, these specifications apply over VCC=12V, and TA =-20~70oC. Typlcal values are at TA=25oC.
Symbol
Parameter
GATE DRIVERS
IUGATE Upper Gate Source Current
IUGATE Upper Gate Sink Current
ILGATE Lower Gate Source Current
ILGATE Lower Gate Sink Current
RUGATE Upper Gate Source Impedance
RUGATE Upper Gate Sink Impedance
RLGATE Lower Gate Source Impedance
RLGATE Lower Gate Sink Impedance
TD Dead Time
PROTECTIONS
VOCP
VUVP
Over-Current Reference Voltage
Under-Voltage Threshold
Trip Point
SOFT-START
TSS
Tdelay
Soft-Start Interval
Delay Time (Note 2)
Note 2: Guaranteed by design.
Test Conditions
VBOOT = 12V, VUGATE -VPHASE = 2V
VBOOT = 12V, VUGATE -VPHASE = 2V
VCC = 12V, VLGATE = 2V
VCC = 12V, VLGATE = 2V
VBOOT = 12V, IUGATE = 0.1A
VBOOT = 12V, IUGATE = 0.1A
VCC = 12V, ILGATE = 0.1A
VCC = 12V, ILGATE = 0.1A
TA =-20~70°C
Percent of VREF
APW7065C
Min Typ Max
Unit
- 2.6 -
- 1.05 -
A
A
- 4.9 -
A
- 1.4 -
A
- 23
-
1.6 2.4
- 1.3 1.95
- 1.25 1.88
- 20 - ns
0.27 0.29 0.31
45 50 55
V
%
1 1.7 2.6 ms
1.1 1.6 2.1 ms
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Mar., 2008
4
www.anpec.com.tw



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