TPS62743_16 Datasheet, PDF (1/25 Pages) Texas Instruments – 300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current

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TPS62743, TPS627431
SLVSCQ0A – JUNE 2015 – REVISED MAY 2016
TPS62743 TPS627431 300/400 mA High Efficiency Buck Converter with Ultra-low
Quiescent Current
1 Features
•1 Input Voltage Range V_IN from 2.15 V to 5.5 V
• Input Voltage Range Down to 2.0 V Once Started
• Output Current
– TPS62743 300 mA
– TPS627431 400mA
• 360 nA Operational Quiescent Current
• Up to 90% Efficiency at 10-µA Output Current
• Power Save Mode Operation
• Selectable Output Voltages
– 8 voltage options between 1.2 V to 3.3 V
• Output Voltage Discharge
• Low Output Voltage Ripple
• Automatic Transition to No Ripple 100% Mode
• RF Friendly DCS-Control™
• Total Solution Size <10mm²
• Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package
2 Applications
• Wearables
• Fitness Tracker
• Smart Watch
• Health Monitoring
• Bluetooth^® Low Energy, RF4CE, Zigbee
• High-efficiency, Ultra Low Power Applications
• Energy Harvesting
3 Description
The TPS62743 is a high efficiency step down
converter with ultra low quiescent current of typical
360 nA. The device is optimized to operate with a
2.2-µH inductor and 10µF output capacitor. The
device uses DCS-Control™ and operates with a
typical switching frequency of 1.2 MHz. In Power
Save Mode the device extends the light load
efficiency down to a load current range of 10-µA and
below. TPS62743 provides an output current of 300
mA. Once started the device operates down to an
input voltage range of 2.0 V. This allows to operate
the device directly from a single Li-MnO₂ coin cell.
The TPS62743 provides 8 programmable output
voltages between 1.2V and 3.3V selectable by three
selection pins. The TPS62743 is optimized to provide
a low output voltage ripple and low noise using a
small output capacitor. Once the input voltage comes
close to the output voltage the device enters the No
Ripple 100% mode to prevent an increase of output
ripple voltage. In this operation mode the device
stops switching and turns the high side MOSFET
switch on.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS62743
DSBGA (8)
1.57 mm × 0.88 mm
TPS627431
DSBGA (8)
1.57 mm x 0.88 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application
VIN
2.0 V to 5.5 V
CIN
4.7 PF
TPS62743
VIN
EN
VSEL1
VSEL2
VSEL3
SW
VOS
GND
L 2.2 PH
VOUT
COUT
10 PF
Low Power
MCU & RF
Copyright © 2016, Texas Instruments Incorporated
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
0.001 0.01
0.1
1
10
IOUT (mA)
VIN = 3.6 V
VIN = 4.2 V
VIN = 5.0 V
100
1000
D006
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.