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TPS63805YFFR

2A buck-boost, 1.3-5.5V in, 11uA IQ, DSBGA-15

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Manufacturer Part：

TPS63805YFFR

Package：

15-Ball DSBGA (2.3 x 1.4 x 0.625 mm)

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Description

Product Overview

The TPS63805YFFR is a Texas Instruments 2A high-efficiency buck-boost converter with 1.3-5.5V input, 1.8-5.2V output, 11uA IQ, power-good, and forced PWM mode. Packaged in DSBGA-15 (2.3×1.4mm), -40C to +125C.

Key Specifications

Input Voltage 1.3 V to 5.5 V
Output Voltage 1.8 V to 5.2 V
Output Current 2 A
IQ 11 uA typical
Switch Current 5 A typical
Package DSBGA-15

Features

  • Non-inverting buck-boost
  • 1.3V to 5.5V input range
  • 1.8V to 5.2V output range
  • 2A output, 5A switch limit
  • 11uA quiescent current
  • Forced PWM or auto PFM/PWM
  • Power-good output

Applications

  • Li-Ion battery systems
  • Optical module supply
  • IoT and smart meters
  • Wearable electronics

The TPS63805YFFR is a Texas Instruments 2A high-efficiency non-inverting buck-boost converter in an ultra-compact 15-ball DSBGA (2.3×1.4mm) package. The 1.3V to 5.5V input range and 1.8V to 5.2V output range cover all common Li-Ion battery and USB power scenarios where the input can be above, below, or equal to the output voltage. The 2A output current with 5A switch limit provides sufficient power for processors, radios, and sensors in portable devices. The 11uA quiescent current in auto PFM mode maximizes battery life during standby. The device seamlessly transitions between buck, buck-boost, and boost modes with hysteresis at mode boundaries to prevent chattering and minimize output ripple. The MODE pin selects between forced PWM (constant frequency, lowest ripple) and auto PFM/PWM (highest efficiency at light load). The power-good output indicates when the output is within regulation. The 100% duty cycle mode in buck operation maximizes dropout performance. The DSBGA package with 0.4mm pitch provides the smallest possible solution footprint for space-constrained wearable and IoT designs. Packaged in DSBGA-15 rated for -40C to +125C.

The TPS63805 uses a 4-switch single-inductor buck-boost topology with integrated NMOS power MOSFETs. In buck mode (VIN > VOUT), switches A and B operate as a synchronous buck converter while D remains on. In boost mode (VIN < VOUT), switches C and D operate as a synchronous boost converter while A remains on. In buck-boost mode (VIN approximately equal to VOUT), all four switches operate in each cycle. The control loop uses a current-mode PWM with seamless mode transitions. The mode transition thresholds include hysteresis: for example, at VOUT=3.3V and 1A load, the converter enters buck-boost from boost at VIN=3.02V but exits back to boost only when VIN drops below 2.78V. This hysteresis prevents frequent mode transitions at the boundary, improving output voltage accuracy and reducing ripple. In forced PWM mode, all switches operate continuously at constant frequency (1.4MHz in buck-boost, 2.1MHz in buck, 1.6MHz in boost), providing the lowest output ripple for noise-sensitive applications like optical modules. In auto PFM mode, the converter skips pulses at light loads to maintain high efficiency.

Pin Mnemonic Description
A1 PG Power-good (open-drain)
A2 MODE PWM/PFM mode select
A3 FB Feedback (sets VOUT)
B1-B3 VOUT Output power
C1-C3 SW Switch nodes
D1-D3 VIN Input power
E1 EN Enable (active high)
E2 AGND Analog ground
E3 GND Power ground
  • Li-Ion battery 3.0-4.2V to 3.3V system supply with seamless buck-boost regulation
  • Optical module 3.3V voltage stabilizer with forced PWM for less than 10mV ripple
  • Smart meter battery backup supply with 11uA IQ and 1.3V minimum input
  • Wearable device 1.8V rail from Li-Ion with DSBGA 2.3×1.4mm ultra-compact footprint
Model Manufacturer Key Difference
TPS63802YFFR TI 1A, lower current
TPS63020 TI Similar, larger package
BQ25756 TI Buck-boost charger
LTC3534 ADI Similar buck-boost
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Contact Information

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Service & Packaging

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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