®
RT6158A
High Efficiency, Low Quiescent, 2A Buck-Boost Converter
General Description
The RT6158A converter is a high efficiency single inductor
converter which can operate with wide input voltage 2.5V
to 5V such as battery which is higher or lower than the
output voltage and it can supply the load current up to 2A.
The maximum peak current in the switches is limited to a
typical value of 4.5A. 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 Buck-Boost
operates at 2MHz typical switching frequency in full
synchronous operation.
The RT6158A operates in Pulse Frequency Modulation
(PFM) mode for increasing efficiency. The PFM mode can
be disabled, forcing the RT6158A to operate at a fixed
switching frequency operation at 2MHz. The RT6158A can
also be synchronized with external frequency at MODE
pin from 2.2MHz to 2.6MHz. The RT6158A output voltage
is programmable using an external resistor divider; the
output voltage range is from 2.1V to 5.2V.
Features
Input Voltage Range : 2.5V to 5V
Adjustable Output Voltage : 2.1V to 5.2V by External
Divided Resistors
Up to 2A Maximum Load Capability for V
IN
= 3V,
V
OUT
= 3.5V
Up to 96% Efficiency (V
IN
= 4.2V, V
OUT
= 3.5V, I
LOAD
=
0.5A)
OCP, OVP, OTP, UVLO and SCP Function
2MHz Switching Frequency
5μA Non-Switching Low Quiescent Current
μ
Forced PWM and Automatic PFM/PWM Mode
Selection
Output Fast Discharge Function
Automatic / Seamless Step Up and Step Down
Mode Transitions
25-Ball WL-CSP Package
Ordering Information
RT6158A
Package Type
WSC : WL-CSP-25B 2.07x2.33 (BSC)
Note :
Richtek products are :
�½
Applications
Cellular Telephones
Wifi Module
Tablet PC
Portable Instrument
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.
�½
Simplified Application Circuit
L1
LX1
V
IN
C
IN
AVIN
EN
FB
R2
MODE
AGND
PGND
PVIN
RT6158A
VOUT
R1
C
FF
C
OUT
V
OUT
LX2
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6158A-05 August 2019
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
