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TPS62736, TPS62737
SLVSBO4C – OCTOBER 2012 – REVISED DECEMBER 2014
TPS6273x Programmable Output Voltage Ultra-Low Power Buck Converter With Up to 50 mA / 200 mA Output Current
1 Features
•1 Industry's Highest Efficiency at Low Output Currents: > 90% With IOUT = 15 µA
• Ultra-Low Power Buck Converter – TPS62736 Optimized for 50-mA Output Current – TPS62737 Optimized for 200-mA Output Current – 1.3-V to 5-V Resistor Programmable Output Voltage Range – 2-V to 5.5-V Input Operating Range – 380-nA and 375-nA Quiescent Current During Active Operation for TPS62736 and TPS62737 – 10-nA Quiescent Current During Ship Mode Operation – 2% Voltage Regulation Accuracy
• 100% Duty Cycle (Pass Mode) • EN1 and EN2 Control
– Two Power-Off States: 1. Shipmode (Full Power-Off State) 2. Standby Mode Includes VIN_OK Indication
• Input Power-Good Indication (VIN_OK) – Push-Pull Driver – Resistor Programmable Threshold Level
2 Applications
• Ultra-Low Power Applications • 2-Cell and 3-Cell Alkaline-Powered Applications • Energy Harvesting • Solar Chargers • Thermal Electric Generator (TEG) Harvesting • Wireless Sensor Networks (WSN) • Low-Power Wireless Monitoring • Environmental Monitoring • Bridge and Structural Health Monitoring (SHM) • Smart Building Controls • Portable and Wearable Health Devices • Entertainment System Remote Controls
3 Description
The TPS6273x family provides a highly integrated ultra low power buck converter solution that is well suited for meeting the special needs of ultra-low power applications such as energy harvesting. The TPS6273x provides the system with an externally programmable regulated supply to preserve the overall efficiency of the power-management stage compared to a linear step-down converter. This regulator is intended to step-down the voltage from an energy storage element such as a battery or super capacitor to supply the rail to low-voltage electronics. The regulated output has been optimized to provide high efficiency across low-output currents (<10 µA) to high currents (200 mA).
The TPS6273x integrates an optimized hysteretic controller for low-power applications. The internal circuitry uses a time-based sampling system to reduce the average quiescent current.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS6273x
VQFN (14)
3.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
> 90% at IOUT = 15 2A
VIN IN
SW
OUT
4.7F TPS62736
L 10 2H
22 2F
VOUT
Efficiency (%)
Efficiency vs Output Current
100 TPS62736
95
90
85
80
75
70
65 60 55 0.001
0.01
Test Conditions: VO = 2.5V, VIN = 3V, TA = 25oC, L = 10mH (Toko DFE252012C)
0.1 1 Iout (mA)
10 100
G000
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
TPS62736, TPS62737
SLVSBO4C – OCTOBER 2012 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Description (continued)......................................... 3 6 Device Voltage Options......................................... 3 7 Pin Configuration and Functions ......................... 4 8 Specifications......................................................... 5
8.1 Absolute Maximum Ratings ...................................... 5 8.2 Handling Ratings ...................................................... 5 8.3 Recommended Operating Conditions....................... 5 8.4 Thermal Information .................................................. 5 8.5 Electrical Characteristics........................................... 6 8.6 Typical Characteristics .............................................. 8 9 Detailed Description ............................................ 18 9.1 Overview ................................................................. 18 9.2 Functional Block Diagram ....................................... 18
9.3 Feature Description................................................. 18 9.4 Device Functional Modes........................................ 20 10 Application and Implementation........................ 21 10.1 Application Information.......................................... 21 10.2 Typical Applications ............................................. 21 11 Power Supply Recommendations ..................... 28 12 Layout................................................................... 28 12.1 Layout Guidelines ..............