Step-up DC/DC converter TPS61021A

ICSMDfor mobile devices

Overview
The TPS61021A is a synchronous boost converter IC designed for battery-powered portable and smart devices. It delivers up to 3.3 V at 1.5 A from inputs down to 1.8 V and can operate from inputs as low as 0.5 V to extend battery runtime. Protections include output overvoltage, output short circuit and thermal shutdown. Its 2.0 MHz switching frequency enables small external inductors and capacitors and a compact 2.0 mm × 2.0 mm WSON package.

Key features

• Input voltage range: 0.5 V to 4.4 V
• Minimum startup voltage: 0.9 V
• Adjustable output voltage: 1.8 V to 4.0 V
• Typical output: 3.3 V at 1.5 A (VIN ≥ 1.8 V)
• Typical efficiency up to 91% (VIN=2.4 V, VOUT=3.3 V, IOUT=1.5 A)
• 2.0 MHz switching frequency
• Typical quiescent current: 17 µA
• Typical switch current limit: 4.3 A
• PFM mode at light load and true input-output disconnect during shutdown
• Output overvoltage, short-circuit and thermal protections
• 2.0 mm × 2.0 mm WSON package

Technical parameters (summary)
Topology: Boost
Vin (min) (V): 0.5
Vin (max) (V): 4.4
Vout (min) (V): 1.8
Vout (max) (V): 4.0
Switch current limit (typ) (A): 4.3
Iq (typ) (A): 0.000017
Duty cycle (max) (%): 90
Operating temperature range (°C): -40 to 125
Features: Enable, Light-load efficiency (PFM), Load Disconnect, Pass-through mode, Synchronous rectification

Applications

• Battery-powered IoT and portable devices
• Wearables and handheld instruments
• Portable medical devices
• Game controllers and consumer electronics
• Supercap backup and energy-harvesting systems