PWM Controller. APW7088 Datasheet

APW7088 Controller. Datasheet pdf. Equivalent

Part APW7088
Description Two-Phase Buck PWM Controller
Feature APW7088 Two-Phase Buck PWM Controller with Integrated MOSFET Drivers Features General Description .
Manufacture ANPEC
Datasheet
Download APW7088 Datasheet




APW7088
APW7088
Two-Phase Buck PWM Controller with Integrated MOSFET Drivers
Features
General Description
Voltage-Mode Operation with Current Sharing
- Adjustable Feedback Compensation
- Fast Load Transient Response
Operate with 8V~13.2 VCC Supply Voltage
Programmable 3-Bit DAC Reference
-±1.5% System Accuracy Over-Temperature
Support Single- and Two-Phase Operations
5V Linear Regulator Output on 5VCC
8~12V Gate Drivers with Internal Bootstrap Diode
Lossless Inductor DCR Current Sensing
Fixed 300kHz Operating Frequency Per Phase
Power-OK Indicator Output
- Regulated 1.5V on POK
Adjustable Over-Current Protection (OCP)
Accurate Load Line (DROOP) Programming
Adjustable Soft-Start
Over-Voltage Protection (OVP)
Under-Voltage Protection (UVP)
Over-Temperature Protection (OTP)
QFN4x4 24-Lead Package (QFN4x4-24A)
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
VID0
VID1
VID2
VIN1
APW7088
POK
COMP
FB
VIN2
VOUT
The APW7088, two-phase PWM control IC, provides a
precision voltage regulation system for advanced graphic
microprocessors in graphics card applications. The inte-
gration of power MOSFET drivers into the controller IC
reduces the number of external parts for a cost and space
saving power management solution.
The APW7088 uses a voltage-mode PWM architecture,
operating with fixed-frequency, to provide excellent load
transient response. The device uses the voltage across
the DCRs of the inductors for current sensing. Load line
voltage positioning (DROOP), channel-current balance,
and over-current protection are accomplished through
continuous inductor DCR current sensing.
The MODE pin programs single- or two- phase operation.
When IC operates in two-phase mode normally, it can
transfer two-phase mode to single phase mode at liberty.
Nevertheless, once operates in single-phase mode, the
operation mode is latched. It is required to toggle SS or
5VCC pin to reset the IC. Such feature of the MODE pin
makes the APW7088 ideally suitable for dual power input
applications, such as PCIE interfaced graphic cards.
This control IC‘s protection features include a set of so-
phisticated over-temperature, over-voltage, under-
voltage, and over-current protections. Over-voltage results
in the converter turning the lower MOSFETs on to clamp
the rising output voltage and protects the microprocessor.
The over-current protection level is set through external
resistors. The device also provides a power-on-reset func-
tion and a programmable soft-start to prevent wrong op-
eration and limit the input surge current during power-on
or start-up.
The APW7088 is available in a QFN4x4-24A package.
Applications
Graphics Card GPU Core Power Supply
Motherboard Chipset or DDR SDRAM Core Power
Supply
On-Board High Power PWM Converter with
Output Current up to 60A
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.6 - Dec., 2010
1
www.anpec.com.tw



APW7088
APW7088
Ordering and Marking Information
APW7088
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QA : QFN4x4-24A
Operating Ambient Temperature Range
E : -20 to 70 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
APW7088 QA :
APW7088
XXXXX
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-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).
Pin Configuration
24 23 22 21 20 19
UGATE1 1
BOOT1 2
5VCC 3
AGND 4
MODE 5
CSP1 6
25
PGND
18 UGATE2
17 BOOT2
16 POK
15 VID1
14 SS
13 FB
7 8 9 10 11 12
QFN4x4-24A
(Top View)
Absolute Maximum Ratings (Note 1)
Symbol
VCC
VBOOT1/2
Parameter
VCC Supply Voltage (VCC to AGND)
BOOT1/2 Voltage (BOOT1/2 to PHASE1/2)
UGATE1/2 Voltage (UGATE1/2 to PHASE1/2)
<200ns pulse width
>200ns pulse width
LGATE1/2 Voltage (LGATE1/2 to PGND)
<200ns pulse width
>200ns pulse width
PHASE1/2 Voltage (PHASE1/2 to PGND)
<200ns pulse width
>200ns pulse width
Copyright © ANPEC Electronics Corp.
Rev. A.6 - Dec., 2010
2
Rating
-0.3 ~ 15
-0.3 ~ 15
-5 ~ VBOOT1/2+5
-0.3 ~ VBOOT1/2+0.3
-5 ~ VCC+5
-0.3 ~ VCC+0.3
-10 ~ 30
-2 ~ 15
Unit
V
V
V
V
V
www.anpec.com.tw







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