RTQ1741A Buck-Boost Converter Datasheet

RTQ1741A Datasheet, PDF, Equivalent


Part Number

RTQ1741A

Description

High Efficiency Single Inductor Buck-Boost Converter

Manufacture

Richtek

Total Page 16 Pages
Datasheet
Download RTQ1741A Datasheet


RTQ1741A
®
RTQ1741A
High Efficiency Single Inductor Buck-Boost Converter
General Description
The RTQ1741A 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 4.5A.
The RTQ1741A 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 RTQ1741A operates at 2.4MHz
typical switching frequency in full synchronous operation.
The RTQ1741A 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 RTQ1741A to operate at a fixed
switching frequency operation at 2.4MHz. The RTQ1741A
can also be synchronized with external frequency from
2.2MHz to 2.6MHz. The output voltage is programmable
using an external resistor divider.
Applications
Cellular Phones
Portable Hard Disk Drives
PDAs
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
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
RTQ1741A
VIN VIN VOUT
VINA
FB
Enable
EN PGOOD
PS/SYNC
GND PGND
VOUT
Power Good
Output
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
DSQ1741A-00 October 2019
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RTQ1741A
RTQ1741A
Ordering Information
RTQ1741A
Package Type
QW : WDFN-14AL 4x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
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
0J=YM
DNN
0J= : Product Code
YMDNN : Date Code
Functional Pin Description
Pin No.
1
2
Pin Name
VINA
GND
3 FB
4, 5
6, 7
8, 9
10, 11
12
VOUT
LX2
LX1
VIN
EN
13 PS/SYNC
14 PGOOD
15
(Exposed Pad)
PGND
Pin Function
Supply voltage input.
Analog ground.
Voltage feedback of adjustable versions, must be connected to VOUT on fixed
output voltage versions.
Buck-boost converter output.
Second switch node.
First switch node.
Power input.
Enable control input (1 Enabled, 0 Disabled). Must not be left open.
Enable/disable control input for power save mode (1 disabled, 0 enabled, clock
signal for synchronization). Must not be left open.
Power good indicator Output. (1 good, 0 failure; open drain).
Power ground. The exposed pad must be soldered to a large PCB and
connected to PGND for maximum power dissipation.
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DSQ1741A-00 October 2019


Features ® RTQ1741A High Efficiency Single Indu ctor Buck-Boost Converter General Desc ription The RTQ1741A is a high efficien cy single inductor BuckBoost Converter which can operate with wide input volta ge such as battery which is higher or l ower 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 4.5A. Th e RTQ1741A feedback loop is internally compensated for both Buck and Boost ope ration and it provides seamless transit ion between Buck and Boost modes and op timal transient response. The RTQ1741A operates at 2.4MHz typical switching fr equency in full synchronous operation. The RTQ1741A operates in Pulse Skipped Modulation (PSM) mode for increasing ef ficiency during low power RF transmissi on modes. The Power Save Mode can be di sabled, forcing the RTQ1741A to operate at a fixed switching frequency operati on at 2.4MHz. The RTQ1741A can also be synchronized with external frequency from 2.2MHz to 2.6MHz. The .
Keywords RTQ1741A, datasheet, pdf, Richtek, High, Efficiency, Single, Inductor, Buck-Boost, Converter, TQ1741A, Q1741A, 1741A, RTQ1741, RTQ174, RTQ17, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)