TPS61022 8-A Boost Converter with 0.5-V Ultra-low Input Voltage

1 Features

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 12-mΩ (LS) / 18-mΩ (HS) MOSFETs
8-A valley switching current limit
94.7% efficiency at V_IN = 3.6 V, V_OUT = 5 V and I_OUT = 3 A
1-MHz switching frequency when V_IN > 1.5 V and 0.6-MHz switching frequency when V_IN < 1 V
±2.5% reference voltage accuracy over –40°C to +125°C
Pin-selectable auto PFM operation mode or forced PWM operation mode at light load
Pass-through mode when V_IN > V_OUT
True disconnection between input and output during shutdown
Output overvoltage and thermal shutdown protections
Output short-circuit protection
2-mm × 2-mm VQFN 7-pin package

2 Applications

USB port
Supercap backup
GPRS power supply

3 Description

The TPS61022 provides a power supply solution for portable equipment and IoT devices powered by various batteries and super capacitors. The TPS61022 has minimum 6.5-A valley switch current limit over full temperature range. With a wide input voltage range of 0.5 V to 5.5 V, the TPS61022 supports supercapacitor backup power applications, which may deeply discharge the supercapacitor.

The TPS61022 operates at 1-MHz switching frequency when the input voltage is above 1.5 V. the switching frequency decreases gradually to 0.6 MHz when the input voltage is below 1.5 V down to 1 V. A MODE pin sets the TPS61022 operating either in power-save mode or forced PWM mode in light load condition. The TPS61022 only consumes a 26-µA quiescent current from V_OUT in light load condition. During shutdown, the load is completely disconnected from the input power. The TPS61022 has 5.7-V output overvoltage protection, output short-circuit protection, and thermal shutdown protection.

The TPS61022 offers a very small solution size with its 2-mm × 2-mm VQFN package and minimum amount of external components.

Device Information

PART NUMBER	PACKAGE⁽¹⁾	BODY SIZE (NOM)
TPS61022	VQFN (7)	2.00 mm × 2.00 mm

(1) For all available packages, see the orderable addnedum at the end of the data sheet.

Typical Application Circuit

A ceramic output capacitor is needed and must be close to VOUT pin and GND pin of the TPS61022

Layout Example

4 Revision History

Changes from Revision C (June 2021) to Revision D (July 2021)

Added I_Q into VIN typical valueGo
Changed I_SD test conditions from 5.5 V to 5.0 VGo
Changed I_SD, T_J maximum value from 3.0 μA to 3.5 μAGo

Changes from Revision B (January 2020) to Revision C (June 2021)

Updated the numbering format for tables, figures, and cross-references throughout the document. Go

5 Pin Configuration and Functions

Figure 5-1 7-Pin VQFN with Thermal Pad RWU Package(Top View)

Table 5-1 Pin Functions

PIN		I/O	DESCRIPTION
NO.	NAME	I/O	DESCRIPTION
1	GND	PWR	Ground pin of the IC. The GND pad of output capacitor must be close to the GND pin. Layout example is shown in Figure 10-1.
2	SW	PWR	The switch pin of the converter. It is connected to the drain of the internal low-side power MOSFET and the source of the internal high-side power MOSFET.
3	VOUT	PWR	Boost converter output. The VOUT pad of output capacitor must be close to the VOUT pin. Layout example is shown in Figure 10-1.
4	FB	I	Voltage feedback of adjustable output voltage.
5	EN	I	Enable logic input. Logic high voltage enables the device. Logic low voltage disables the device and turns it into shutdown mode.
6	MODE	I	Operation mode selection in the light load condition. When it is connected to logic high voltage, the device works in forced PWM mode. When it is connected to logic low voltage, the device works in auto PFM mode.
7	VIN	I	IC power supply input.