®
RT5707/A
Ultra-Low Quiescent Current HCOT Buck Converter
General Description
Features
Input Voltage Range : 2.2V to 5.5V
Programmable Output Voltage 8-Level
RT5707 1.2V to 3.3V
The RT5707/A is a high efficiency synchronous step-down
converter featuring typ. 360nA quiescent current. It provides
high efficiency at light load down to 10mA. Its input voltage
range is from 2.2V to 5.5V. The RT5707 provides eight
programmable output voltage 1.2V to 3.3V while delivering
output current up to 600mA, peak to 1A. The RT5707A
provides eight programmable output voltage 0.7V to 3.1V
while delivering output current up to 400mA, peak to 0.5A.
RT5707A 0.7V to 3.1V
Typ. 360nA Quiescent Current
PSM Operation
Up to 94% Efficiency
Internal Compensation
Output Voltage Discharge
Over-Current Protection
The Hysteretic Constant-On-Time (HCOT) operation with
internal compensation allow the transient response to be
optimized over a wide range of loads and output capacitors.
Over-Temperature Protection
Output Current
The RT5707/A is a available in WL-CSP-8B 0.9x1.6 (BSC)
package.
RT5707 600mA, Peak to 1A
RT5707A 400mA, Peak to 0.5A
Automatic Transition to 100% Duty Cycle Operation
Ordering Information
Applications
RT5707/A
Hand-HeldDevices
Portable Information
Battery Powered Equipment
WearableDevices
Internet of Things
Package Type
WSC : WL-CSP-8B 0.9x1.6 (BSC)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Smart Watch
Simplified Application Circuit
RT5707/A
L1
VIN
EN
V
SW
V
OUT
OUT
IN
C
C
IN
VOUT
VSEL1
VSEL2
VESL3
V
V
V
or GND
or GND
or GND
IN
IN
IN
GND
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS5707/A-03 February 2019
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
