Step-Down Converter. RT8071A Datasheet


RT8071A Converter. Datasheet pdf. Equivalent


Part Number

RT8071A

Description

Synchronous Step-Down Converter

Manufacture

Richtek

Total Page 15 Pages
Datasheet
Download RT8071A Datasheet


RT8071A
®
RT8071A
3A, 1MHz, Synchronous Step-Down Converter
General Description
The RT8071A is a high efficiency synchronous, step-down
DC-DC converter. Its input voltage ranges from 2.7V to
5.5V that provides an adjustable regulated output voltage
from 0.6V to VIN while delivering up to 3A of output current.
The internal synchronous low On-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The switching frequency is
fixed internally at 1MHz. The 100% duty cycle provides
low dropout operation, hence extending battery life in
portable systems. Current mode operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output capacitors.
The RT8071A is available in a WDFN-10L 3x3 package.
Ordering Information
RT8071A
Package Type
QW : WDFN-10L 3x3 (W-Type)
Note :
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
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.
Features
High Efficiency : Up to 95%
Low RDS(ON) Power Switches : 69mΩ/49mΩ
Current Mode Operation
Fast Transient Response
Fixed Frequency : 1MHz
No Schottky Diode Required
Internal Compensation
0.6V Reference Allows Low Output Voltage
Low Dropout Operation : 100% Duty Cycle
OCP, UVP, OTP
OpenVReg Type 0-LV Compliant
RoHS Compliant and Halogen Free
Applications
Portable Instruments
Battery Powered Equipment
Notebook Computers
Distributed Power Systems
IP Phones
Digital Cameras
Marking Information
3A : Product Code
3A YM
DNN
YMDNN : Date Code
Simplified Application Circuit
VIN
Chip Enable
RT8071A
VIN SW
VCC
EN
FB
PGOOD
GND
PGOOD
VOUT
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS8071A-03 March 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT8071A
RT8071A
Pin Configuration
(TOP VIEW)
FB 1
VCC 2
VIN 3
GND 4
GND 5
10 EN
9 PGOOD
8 NC
7 SW
11 6 SW
WDFN-10L 3x3
Functional Pin Description
Pin No.
Pin Name
1 FB
2 VCC
3 VIN
4, 5,
11 (Exposed Pad)
GND
6, 7 SW
8 NC
9 PGOOD
10 EN
Pin Function
Feedback Input. This pin receives the feedback voltage from a resistive
voltage divider connected across the output.
Supply Voltage Input. Decouple this pin to GND with at least 1F ceramic cap.
Power Input. Decouple this pin to GND with at least 10F ceramic cap.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Switch Node. Connect this pin to the inductor.
No Internal Connection.
Power Good Indicator. This pin is an open drain logic output. The PGOOD will
be pulled to ground when the output voltage is less than 90% of the target
output voltage.
Enable Control Input. Pull high the EN pin to turn on the converter.
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8071A-03 March 2017


Features ® RT8071A 3A, 1MHz, Synchronous Step-D own Converter General Description The RT8071A is a high efficiency synchronou s, step-down DC-DC converter. Its input voltage ranges from 2.7V to 5.5V that provides an adjustable regulated output voltage from 0.6V to VIN while deliver ing up to 3A of output current. The int ernal synchronous low On-resistance pow er switches increase efficiency and eli minate the need for an external Schottk y diode. The switching frequency is fix ed internally at 1MHz. The 100% duty cy cle provides low dropout operation, hen ce extending battery life in portable s ystems. Current mode operation with int ernal compensation allows the transient response to be optimized over a wide r ange of loads and output capacitors. Th e RT8071A is available in a WDFN-10L 3x 3 package. Ordering Information RT807 1A Package Type QW : WDFN-10L 3x3 (W-T ype) Note : Lead Plating System Z : E CO (Ecological Element with Halogen Fre e and Pb free) Richtek products are :  RoHS compliant and com.
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