RT5707A Buck Converter Datasheet

RT5707A Datasheet, PDF, Equivalent


Part Number

RT5707A

Description

Ultra-Low Quiescent Current HCOT Buck Converter

Manufacture

Richtek

Total Page 16 Pages
Datasheet
Download RT5707A Datasheet


RT5707A
®
RT5707/A
Ultra-Low Quiescent Current HCOT Buck Converter
General Description
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.
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.
The RT5707/A is a available in WL-CSP-8B 0.9x1.6 (BSC)
package.
Features
Input Voltage Range : 2.2V to 5.5V
Programmable Output Voltage 8-Level
RT5707 1.2V to 3.3V
RT5707A 0.7V to 3.1V
Typ. 360nA Quiescent Current
PSM Operation
Up to 94% Efficiency
Internal Compensation
Output Voltage Discharge
Over-Current Protection
Over-Temperature Protection
Output Current
RT5707 600mA, Peak to 1A
RT5707A 400mA, Peak to 0.5A
Automatic Transition to 100% Duty Cycle Operation
Ordering Information
RT5707/A
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.
Applications
Hand-Held Devices
Portable Information
Battery Powered Equipment
Wearable Devices
Internet of Things
Smart Watch
Simplified Application Circuit
VIN
CIN
RT5707/A
VIN SW
VOUT
EN VSEL1
VSEL2
VESL3
GND
L1
VOUT
COUT
VIN or GND
VIN or GND
VIN or GND
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
DS5707/A-03 February 2019
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT5707A
RT5707/A
Marking Information
RT5707WSC
6E : Product Code
6EW
W : Date Code
RT5707AWSC
6Z : Product Code
6ZW
W : Date Code
Pin Configuration
(TOP VIEW)
SW A1 A2 VIN
EN B1 B2 GND
VSEL1 C1 C2 VOUT
VSEL2 D1 D2 VSEL3
WL-CSP-8B 0.9x1.6 (BSC)
Functional Pin Description
Pin No.
A1
A2
B1
B2
C1
C2
D1
D2
Pin Name
SW
VIN
EN
GND
VSEL1
VOUT
VSEL2
VSEL3
Pin Function
This pin is the connection between two build-in switches in the chip, which
should be connected to the external inductor. The inductor should be
connected to this pin with the shortest path.
Supply input. A minimum of 10F (RT5707) and 4.7F (RT5707A) ceramic
capacitor should be connected to this pin with the shortest path
Chip enable input pin. High level voltage enables the device while low level
voltage turns the device off. This pin must be terminated.
Device ground pin. This pin should be connected to input and output
capacitors with the shortest path.
Output voltage selection pin. This pin must be terminated.
Output voltage feedback pin. This pin should be connected close to the output
capacitor terminal for better voltage regulation. A minimum of 10F ceramic
capacitor should be connected to this pin with the shortest path.
Output voltage selection pin. This pin must be terminated.
Output voltage selection pin. This pin must be terminated.
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5707/A-03 February 2019


Features ® RT5707/A Ultra-Low Quiescent Current HCOT Buck Converter General Descripti on The RT5707/A is a high efficiency sy nchronous step-down converter featuring typ. 360nA quiescent current. It provi des high efficiency at light load down to 10mA. Its input voltage range is fro m 2.2V to 5.5V. The RT5707 provides eig ht programmable output voltage 1.2V to 3.3V while delivering output current up to 600mA, peak to 1A. The RT5707A prov ides eight programmable output voltage 0.7V to 3.1V while delivering output cu rrent up to 400mA, peak to 0.5A. The Hy steretic Constant-On-Time (HCOT) operat ion with internal compensation allow th e transient response to be optimized ov er a wide range of loads and output cap acitors. The RT5707/A is a available in WL-CSP-8B 0.9x1.6 (BSC) package. Feat ures  Input Voltage Range : 2.2V to 5.5V  Programmable Output Voltage 8- Level  RT5707 1.2V to 3.3V  RT570 7A 0.7V to 3.1V  Typ. 360nA Quiescen t Current  PSM Operation  Up to 94% Efficiency  Internal Compensation .
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