Document
APW7165C
5V to 12V Synchronous Buck Controller
Features
General Description
• Wide Operation Supply Voltage from 5V to 12V • Power-On-Reset Monitoring on VCC • Excellent Reference Voltage Regulations
- 0.6V Internal Reference - ±1% Over Temperature Range • Integrated Soft-Start • Automatic PSM/PWM Modes • Voltage Mode PWM Operation with 90% (Max.) Duty Cycle • Under-Voltage Protection • Adjustable Over-Current Protection Threshold - Sensing the RDS(ON) of Low-Side MOSFET • Over-Voltage Protection • Under-Voltage Protection • Simple SOP-8P Package • Lead Free and Green Devices Available (RoHS Compliant)
Applications
• Graphic Cards • DSL, Switch HUB • Wireless Lan • Notebook Computer • Mother Board • LCD Monitor/TV
Pin Configuration
The APW7165Cis a voltage mode, fixed 300kHz-switching frequency, and synchronous buck controller. The APW7165C allows wide input voltage that is either a single 5~12V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A builtin digital soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.6V temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low output voltage applications. The APW7165C provides excellent output voltage regulations against load current variation. The controller’s over-current protection monitors the output current by using the voltage drops across the R
DS(ON)
of low-side MOSFET, eliminating the need for a current sensing resistor that features high efficiency and low cost. The APW7165C also integrates over-voltage protection (OVP) and under-voltage protection circuit which monitors the FB voltage to prevent the PWM output from over and under voltage. The APW7165C is available in a simple SOP-8P package.
Simplified Application Circuit
OFF ON
VVCC APW7165C
5 VCC BOOT 1
7
UGATE 2 COMP
PHASE 8
LGATE 4 6 FB GND
3
VIN VOUT
BOOT 1 UGATE 2
GND 3 LGATE 4
9 GND
8 PHASE 7 COMP 6 FB 5 VCC
SOP-8P (Top View)
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 - Oct., 2012
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APW7165C
Ordering and Marking Information
Assembly Material
Assembly Material G : Halogen and Lead Free Device
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-020D 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
VVCC VCC Supply Voltage (VCC to GND)
-0.3 ~ 16
V
VBOOT BOOT to PHASE Voltage
-0.3 ~ 16
V
VUGATE UGATE to PHASE Voltage
> 400ns < 400ns
-0.3 ~ VBOOT+0.3 -5 ~ VBOOT+5
V V
VLGATE LGATE to GND Voltage
> 400ns < 400ns
-0.3 ~ VVCC+0.3 -5 ~ VVCC+5
V V
VPHASE PHASE to GND Voltage
> 200ns < 200ns
-0.3 ~ 16 -10 ~ 30
V V
FB and COMP to GND (< VVCC + 0.3V)
-0.3 ~ 7
V
TJ Maximum Junction Temperature
150 °C
TSTG
Storage Temperature
-65 ~ 150
°C
TSDR Maximum Lead Soldering Temperature, 10 Seconds
260 °C
Note1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability
Thermal Characteristics
Symbol θJA
Parameter Thermal Resistance -Junction to Ambient (Note 2)
θJC Thermal Resistance -Junction to Case
SOP-8P SOP-8P
Typical Value 80 20
Note 2 : θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.
Unit °C/W °C/W
Copyright © ANPEC Electronics Corp. Rev. A.2 - Oct., 2012
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APW7165C
Recommended Operating Conditions (Note 3)
Symbol
Parameter
VVCC VCC Supply Voltage (VCC to GND)
VOUT Converter Output Voltage
VIN Converter Input Voltage
IOUT Converter Output Current
TA Ambient Temperature
TJ Junction Temperature
Note 3: Refer to the application circuit for further information.
Range 4.5 ~ 13.2
0.9 ~ 5 2.9 ~ VVCC
0 ~ 20 -20 ~ 70 -20 ~ 125
Unit V V V A °C °C
Electrical Characteristics
Refer to the typical application circuit. These specifications apply over VVCC = 12V, TA = -20°C to 70°C, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Parameter
Test Co.