Buck-Boost Converter. RT6150A Datasheet


RT6150A Converter. Datasheet pdf. Equivalent


Part Number

RT6150A

Description

Current Mode Buck-Boost Converter

Manufacture

Richtek

Total Page 13 Pages
Datasheet
Download RT6150A Datasheet


RT6150A
®
RT6150A/B
Current Mode Buck-Boost Converter
General Description
The RT6150A/B is a high efficiency, fixed frequency, Buck-
Boost DC/DC converter that operates from input voltages
above, below or equal to the output voltage. The topology
incorporated in the IC provides a continuous transfer
function through all operating modes, making the product
ideal for single lithium-ion, multi-cell alkaline or Ni-MH
battery applications where the output voltage is within the
battery voltage range.
The device includes two N-MOSFET switches and two P-
MOSFET switches for high efficiency operation. Switching
frequency is set at 1MHz to reduce the external
component size. Quiescent current is only 60μA in Power
Save Mode (PSM), maximizing battery life in portable
applications. PSM operation is user controlled and can
be enabled by driving the PS pin low. If the PS pin is
driven high, then fixed frequency switching is enabled.
Other features include low shutdown current, internal
soft-start control, thermal shutdown protection and current
limit. The RT6150A is available in the WDFN-10L 3x3
package and the RT6150B is available in the WDFN-10L
2.5x2.5 package.
Applications
Portable Products
Handheld Instrumentation
Features
Single Inductor
Fixed Frequency Operation with Battery Voltages
Synchronous Rectification : Up to 90% Efficiency
Up to 800mA Continuous Output Current
VOUT Disconnected from VIN during Shutdown
Power Save Mode (PSM) Enable Control
<1μA Shutdown Current
Input Voltage Range: 1.8V to 5.5V
Fixed 3.3V and Adjustable Output Voltage Options
from 1.8V to 5.5V
10-Lead WDFN Packages
RoHS Compliant and Halogen Free
Ordering Information
RT6150A/B-
Package Type
QW : WDFN-10L 3x3 (W-Type)
QW : WDFN-10L 2.5x2.5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Voltage
33 : 3.3V (Only for RT6150B)
A : WDFN-10L 3x3
B : WDFN-10L 2.5x2.5
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.
Simplified Application Circuit
Battery
Enable
LX1 LX2
RT6150A/B
VIN VOUT
VINA
EN
FB
PS
GND
R1
R2
VOUT
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS6150A/B-05 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT6150A
RT6150A/B
Marking Information
RT6150AGQW
0N= : Product Code
0N=YM
DNN
YMDNN : Date Code
RT6150BGQW
00 : Product Code
00W
W : Date Code
Pin Configurations
(TOP VIEW)
VOUT 1
LX2 2
GND 3
LX1 4
VIN 5
10 FB
9 GND
8 VINA
7 PS
11 6 EN
WDFN-10L 3x3 / WDFN-10L 2.5x2.5
RT6150B-33GQW
03W
03 : Product Code
W : Date Code
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
VOUT
Output of the Buck-Boost Converter. Connect a capacitor between the
VOUT and GND.
2 LX2
Second Switch Node. Connect this pin to the inductor.
3, 9,
11 (Exposed Pad)
GND
Power Ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
4 LX1
First Switch Node. Connect this pin to the inductor.
5 VIN
Power Input. Connect an at least 10F capacitor between the VIN pin and
GND.
6 EN
Enable Control Input for the Buck-Boost Converter.
7 PS
PSM Control Input. Pull low for PSM operation and pull high for fixed
switching frequency operation.
8
VINA
Supply Voltage Input for Control Circuit.
10 FB
Feedback Input. For adjustable versions, connect a resistive divider to set
the output voltage and it can be adjusted from 1.8V to 5.5V; For fixed
version, must be connected to VOUT.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS6150A/B-05 July 2015


Features ® RT6150A/B Current Mode Buck-Boost Co nverter General Description The RT6150 A/B is a high efficiency, fixed frequen cy, BuckBoost DC/DC converter that oper ates from input voltages above, below o r equal to the output voltage. The topo logy incorporated in the IC provides a continuous transfer function through al l operating modes, making the product i deal for single lithium-ion, multi-cell alkaline or Ni-MH battery applications where the output voltage is within the battery voltage range. The device incl udes two N-MOSFET switches and two PMOS FET switches for high efficiency operat ion. Switching frequency is set at 1MHz to reduce the external component size. Quiescent current is only 60μA in Pow er Save Mode (PSM), maximizing battery life in portable applications. PSM oper ation is user controlled and can be ena bled by driving the PS pin low. If the PS pin is driven high, then fixed frequ ency switching is enabled. Other featur es include low shutdown current, internal soft-start control, the.
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