APW7281 Datasheet, PDF (1/23 Pages) Anpec Electronics Coropration – Low-, Wide- Voltage Battery Front-End DC/DC Converter Single-Cell Li-Ion, Ni-Rich, Si-Anode Applications

APW7281
Low-, Wide- Voltage Battery Front-End DC/DC Converter Single-Cell
Li-Ion, Ni-Rich, Si-Anode Applications
Features
General Description
• Input Voltage Range: 2.3 to 5V
The APW7281 is a boost converter with bypass mode.
• 9µA Quiescent Current in Low IQ Bypass ^{The operations between DC/DC boost and bypass mode}
Mode
are transitioned seamlessly.
• Fixed Output Voltage Options: 3.15V/3.35V/I2C
Programmable
• APW7281:
VOUTFLOOR_TH=3.15V (default) (I2C program-
mable)
VOUTROOF_TH=3.35V (default) (I2C programm-
able)
• Voltage Scaling Management by VSEL pin
- VSEL=high, minimum VOUT=VOUTROOF_TH
- VSEL=low, minimum VOUT=VOUTFLOOR_TH
• Current Limit at Boost Mode
• Up to 95% Efficiency
• Auto True Bypass Operation when V_IN> Target V_OUT
• Internal Synchronous Rectifier
• Forced Bypass Mode by External BYPB Control
• Mode Control PFM/PWM; Forced PWM Mode
• Short Circuit Protection While True Bypass
Mode
• Low Operating Quiescent Current<150µA
• Available in WLCSP1.66x1.66-16 Package _{Simplified Application Circuit}
Applications
• Single-Cell Ni-Rich, Si-Anode, Li-Ion,
LiFePO4 Smart Phones or Tablet PCs
• 2.5V/3G/4G Mini-Module Data Cards
Battery
VBAT
PFM/PWM
I2C Bus
To system,
Preset minimum level ~ VBAT
SW
VOUT
VIN
PGND
MODE
VSEL
EN
BYPB
SCL
SDA
GPIO
(PG)
AGND
Interupt
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.
1
Rev. A.1 - Mar., 2017
www.anpec.com.tw