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ANPEC

APW8879B Datasheet Preview

APW8879B Datasheet

Synchronous Buck Converter

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APW8879B
High Input Voltage 3.33V / 8A Synchronous Buck Converter with 100mA LDO
Features
General Description
Wide Operating Range from +5.5V to +24V Input
  Voltages
Power-On-Reset Monitoring on VIN at 4.5V ~ 4.9V
  range
Built-in 100uA low quiescent current
Support IOUT = 8A Application
Built in PWM & PFM Control Schemes with COT
  achitecture
Built in Integrated Bootstrap Forward P-CH
  MOSFET
Fixed Switching Frequency from700KHz
Fixed 3.33V VOUT REF voltage with +0.6%
  accuracy
Support Ultrasonic Mode selection on EN Pin
Support built-in fixed Soft Start time 2.4ms
Integrated 25mN-Channel MOSFET For High
  Side MOS
Integrated 12mN-Channel MOSFET For Low Side
  MOS
Built in Open-Drain Type POK function and EN
  control
Built in 3.3V / 100mA LDO and Switch-over
  MOSFET
  with PWM output
UVP setting at 70%of VREF & OVP setting at 125%
  of VREF & Thermal Shutdown
Built in Over Current Protection and Current Limit
  Protection using high-side MOSFET RDS(on) and
  low-side MOSFET RDS(on) sensing
Flip-Chip TQFN 2x3-12P with Lead Free & RoHS
  compliant
The APW8879B is a 8A, synchronous buck converter with
integrated 25mHigh-Side MOSFET and 12mLow-Side
MOSFET. The APW8879B designed with a constant on-
time control architecture can step down high voltage to
accommodate low-voltage chipset for IMPV8 applications.
The APW8879B is equipped with an automatic PFM/PWM
mode operation. At light load, the converter operates in
the PFM mode to reduce the switching losses and provide
high efficiency. At heavy load, the converter works in PWM
mode and operates nearly at constant frequency for low-
noise requirements.
The APW8879B is also equipped with Power-on-reset,
soft-start, and whole protections (under-voltage, over-volt-
age, over-temperature, over-current and current-limit) into
a single package. The charge pump circuit with 250kHz
clock driver uses VOUT as its power supply to generate
approximately 10~12V DC voltage.
This device, available in TQFN 2x3-12 package, provides
a very compact system solution to minimize external com-
ponents and PCB area.
Pin Configuration
APW8879B QBI
12 11 10
9
VIN 1
8 BST
Applications
● Notebook
● Graphic card
● Motherboard
PGND 2
7 LX
3
4
5
6
FC - TQFN 2x3 -12P
(TOP VIEW)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise cus-
tomers to obtain the latest version of relevant information to verify before placing orders.
CopyrightANPEC Electronic Corp.
1
Rev. A.2 – Dec., 2019
www.anpec.com.tw




ANPEC

APW8879B Datasheet Preview

APW8879B Datasheet

Synchronous Buck Converter

No Preview Available !

APW8879B
Simplified Application Circuit
VCC
EN
CVCC
RPOK
VCC
EN VIN
POK
BST
CLK APW8879B
LX
ENCLK
VOUT
AGND PGND
LDO
CLDO
CIN
CB
LOUT
COUT
LDO
VIN
VOUT
Ordering and Marking Information
APW8879B
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB: TQFN2x3-12
Operating Ambient Temperature Range
I : -40 to 85 C°
Handling Code
TR : Tape & Reel
Lead Free Code
L : Lead Free Device
G : Halogen and Lead Free Device
APW8879B QB :
8879B
XXXXX
XXXXX - Date Code
Note 1: 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).
CopyrightANPEC Electronic Corp.
2
Rev. A.2 – Dec., 2019
www.anpec.com.tw



Part Number APW8879B
Description Synchronous Buck Converter
Maker ANPEC
Total Page 3 Pages
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