RT6154A Buck-Boost Converter Datasheet

RT6154A Datasheet, PDF, Equivalent


Part Number

RT6154A

Description

High Efficiency Single Inductor Buck-Boost Converter

Manufacture

Richtek

Total Page 15 Pages
Datasheet
Download RT6154A Datasheet


RT6154A
®
RT6154A/B
High Efficiency Single Inductor Buck-Boost Converter
General Description
The RT6154A/B is a high efficiency single inductor Buck-
Boost Converter which can operate with wide input voltage
such as battery which is higher or lower than the output
voltage and it can supply the load current up to 4A. The
maximum peak current in the switches is limited to a
typical value of 5A at VIN = 3.6V and 2.6A at VIN = 2.1V.
The RT6154A/B feedback loop is internally compensated
for both Buck and Boost operation and it provides seamless
transition between Buck and Boost modes and optimal
transient response. The RT6154A/B operates at 2.4MHz
typical switching frequency in full synchronous operation.
The RT6154A/B operates in Pulse Skipped Modulation
(PSM) mode for increasing efficiency during low power
RF transmission modes. The Power Save Mode can be
disabled, forcing the RT6154A/B to operate at a fixed
switching frequency operation at 2.4MHz. The RT6154A/
B can also be synchronized with external frequency from
2.2MHz to 2.6MHz. The RT6154A output voltage is
programmable using an external resistor divider, and the
RT6154B is fixed internally to 3.3V.
Features
Operates from a Single Li-ion Cell : 1.8V to 5.5V
Adjustable Output Voltage : 1.8V to 5.5V
3A Maximum Load Capability for VIN > 3.6V,
VOUT = 3.3V
Power Save Mode (PSM) for Improving Low Output
Power Efficiency
Fixed Frequency Operation at 2.4MHz and
Synchronization Possible from 2.2MHz to 2.6MHz
Up to 96% Efficiency
Input Current Limit
Internal Compensation
RoHS Compliant and Halogen Free
Applications
Cellular Phones
Portable Hard Disk Drives
PDAs
Pin Configuration
(TOP VIEW)
VINA 1
GND 2
FB 3
VOUT 4
VOUT 5
LX2 6
LX2 7
PGND
15
14 PGOOD
13 PS/SYNC
12 EN
11 VIN
10 VIN
9 LX1
8 LX1
WDFN-14AL 4x3
Simplified Application Circuit
LX1 LX2
RT6154A
VIN VIN VOUT
VINA
FB
VOUT
Enable
EN PGOOD
PS/SYNC
GND PGND
Power Good
Output
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS6154A/B-03 May 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT6154A
RT6154A/B
Ordering Information
RT6154A/B
Package Type
QW : WDFN-14AL 4x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
RT6154A Adjustable Output Voltage
RT6154B Fixed 3.3V Output Voltage
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.
Marking Information
RT6154AGQW
0E= : Product Code
0E=YM
DNN
YMDNN : Date Code
RT6154BGQW
0D=YM
DNN
0D= : Product Code
YMDNN : Date Code
Functional Pin Description
Pin No.
Pin Name
Pin Function
1 VINA
Supply voltage input.
2 GND
Analog ground.
3 FB
Voltage feedback of adjustable versions, must be connected to VOUT on fixed
output voltage versions.
4, 5 VOUT
Buck-boost converter output.
6, 7 LX2
Second switch node.
8, 9 LX1
First switch node.
10, 11
VIN
Power input.
12 EN
Enable control input (1 Enabled, 0 Disabled). Must not be left open.
13
PS/SYNC
Enable/disable control input for power save mode (1 disabled, 0 enabled, clock
signal for synchronization). Must not be left open.
14
PGOOD
Power good indicator output. (1 good, 0 failure; open drain).
15
(Exposed Pad)
PGND
Power ground. The exposed pad must be soldered to a large PCB and
connected to PGND for maximum power dissipation.
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS6154A/B-03 May 2017


Features ® RT6154A/B High Efficiency Single Ind uctor Buck-Boost Converter General Des cription The RT6154A/B is a high effici ency single inductor BuckBoost Converte r which can operate with wide input vol tage such as battery which is higher or lower than the output voltage and it c an supply the load current up to 4A. Th e maximum peak current in the switches is limited to a typical value of 5A at VIN = 3.6V and 2.6A at VIN = 2.1V. The RT6154A/B feedback loop is internally c ompensated for both Buck and Boost oper ation and it provides seamless transiti on between Buck and Boost modes and opt imal transient response. The RT6154A/B operates at 2.4MHz typical switching fr equency in full synchronous operation. The RT6154A/B operates in Pulse Skipped Modulation (PSM) mode for increasing e fficiency during low power RF transmiss ion modes. The Power Save Mode can be d isabled, forcing the RT6154A/B to opera te at a fixed switching frequency opera tion at 2.4MHz. The RT6154A/ B can also be synchronized with ext.
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