TPS61023

Part: TPS61023 — Texas Instruments

Type: Synchronous Boost Converter

Description: 0.5–5.5 V input, 2.2–5.5 V output synchronous boost converter with 47 mΩ / 68 mΩ MOSFETs, 3.7 A typical valley switch current limit and 94% efficiency (VIN = 3.6 V, VOUT = 5 V, IOUT = 1.5 A).

Operating Conditions:

• Supply voltage: 0.5–5.5 V (1.8 V minimum for start-up; VIN UVLO rising 1.7 V typ, 1.8 V max)
• Operating junction temperature: -40 to 125 °C
• Output voltage setting range: 2.2–5.5 V
• Switching frequency: 1 MHz (VIN = 3.6 V), 0.5 MHz (VIN = 1.0 V)

Absolute Maximum Ratings:

• Max voltage at VIN, EN, FB, SW, VOUT: 7 V (-0.3 V min)
• SW spike: 8 V at 10 ns, 9 V at 1 ns
• Max operating junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Valley current limit: 2.7 A min, 3.7 A typ (VIN = 3.6 V, VOUT = 5.0 V)
• Reference voltage at FB: 595 mV typ (580–610 mV, PWM mode)
• Quiescent current into VIN: 0.9 μA typ, 3.0 μA max (no switching, TJ up to 85 °C)
• Quiescent current into VOUT: 20 μA typ, 30 μA max (no switching, TJ up to 85 °C)
• Shutdown current into VIN and SW: 0.1 μA typ, 0.2 μA max (VIN = VSW = 3.6 V, TJ = 25 °C)
• RDS(on): 68 mΩ high-side, 47 mΩ low-side (VOUT = 5.0 V)
• Output overvoltage protection threshold: 5.7 V typ (5.5–6.0 V, VOUT rising)
• Soft-start time: 700 μs typ (VIN = 2.5 V, VOUT = 5.0 V, COUT = 10 μF, no load)
• Thermal shutdown: 150 °C typ, 20 °C hysteresis

Features:

• 1.8 V minimum input voltage for start-up; operates down to 0.5 V once started
• Auto PFM operation at light load
• Pass-through mode when VIN > VOUT
• True disconnection between input and output during shutdown
• ±2.5% reference voltage accuracy over -40 °C to +125 °C
• Output overvoltage, output short-circuit and thermal shutdown protections
• Adaptive constant on-time valley current mode control with internal loop compensation

Applications:

• Electronic shelf label
• Video doorbell
• Remote controller

Package:

• SOT563 (DRL), 6-pin, 1.20 mm × 1.60 mm

• Input voltage range: 0.5 V to 5.5 V
• 1.8-V Minimum input voltage for start-up
• Output voltage setting range: 2.2 V to 5.5 V
• Two 47-mΩ (LS) / 68-mΩ (HS) MOSFETs
• 3.7-A Valley switching current limit
• 94% Efficiency at VIN = 3.6 V, VOUT = 5 V and IOUT = 1.5 A
• 1-MHz Switching frequency when VIN > 1.5 V and 0.5-MHz switching frequency when VIN < 1 V
• Typical 0.1-μA shutdown current from VIN and SW
• ±2.5% Reference voltage accuracy over -40°C to +125°C
• Auto PFM operation mode at light load
• Pass-through mode when VIN > VOUT
• True disconnection between input and output during shutdown
• Output overvoltage and thermal shutdown protections
• Output short-circuit protection
• 1.2-mm × 1.6-mm SOT563 (DRL) 6-pin package

• Electronic shelf label
• Video doorbell
• Remote controller

• FB

• VOUT

• EN

• VIN

• SW

• GND

Figure 5-1. DRL Package 6-Pin SOT563 Top View

TJ = -40°C to 125°C, VIN = 3.6 V and VOUT = 5.0 V. Typical values are at T J = 25°C (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The TPS61023 is a synchronous boost converter designed to operate from an input voltage supply range between 0.5 V and 5.5 V with a typically 3.7-A valley switch current limit. The TPS61023 typically operates at a quasi-constant 1-MHz frequency PWM at moderate-to-heavy load currents when the input voltage is above 1.5 V. The switching frequency changes to 0.5 MHz gradually with the input voltage changing from 1.5 V to 1 V for better efficiency and high step-up ratio. When the input voltage is below 1 V, the switching frequency is fixed at a quasi-constant 0.5 MHz. At light load currents, the TPS61023 converter operates in power-save mode with PFM to achieve high efficiency over the entire load current range.