RT6150A/B

Current Mode Buck-Boost Converter

The RT6150A/B is a current mode buck-boost converter from Richtek. View the full RT6150A/B datasheet below including key specifications, pinout, absolute maximum ratings.

RT6150A/B shares its datasheet with RT6150A, whose page lists every part number it covers.

Official RT6150A/B datasheet (PDF) — the source this page was extracted from.

Manufacturer

Richtek

RT6150A/B Key Specifications

Parameter	Value
Quiescent Current (Power Save Mode)	60 μA (typ, IOUT = 0mA, PS = 0V)
Shutdown Current	0.1 μA (typ, EN = 0V, Not Including Switch Leakage)
N-MOSFET Switch On Resistance	0.15 Ω (typ)
P-MOSFET Switch On Resistance	0.15 Ω (typ)
Switch Current Limit	1.6 A (min, VIN = 3.6V)
Oscillator Frequency	1 MHz (typ)
Feedback Voltage	0.5 V (typ, VPS = VIN)
Thermal Shutdown	140 °C (typ)

RT6150A/B Overview

Part: RT6150A/B from Richtek Technology Corporation

Type: Current Mode Buck-Boost Converter

Description: A high efficiency, fixed frequency Buck-Boost DC/DC converter that operates from 1.8V to 5.5V input, providing up to 800mA continuous output current with up to 90% efficiency and a 1MHz switching frequency.

Operating Conditions:

Supply voltage: 1.8V to 5.5V
Operating temperature: -40°C to 85°C (Ambient)
Junction temperature: -40°C to 125°C
Switching frequency: 1 MHz (typical)

Absolute Maximum Ratings:

Max supply voltage: 6V (VOUT, VIN, EN, PS, VINA, FB Pin)
Max junction temperature: 150°C
Max storage temperature: -65°C to 150°C

Key Specs:

Quiescent Current (Power Save Mode): 60 μA (typ, IOUT = 0mA, PS = 0V)
Shutdown Current: 0.1 μA (typ, EN = 0V, Not Including Switch Leakage)
N-MOSFET Switch On Resistance: 0.15 Ω (typ)
P-MOSFET Switch On Resistance: 0.15 Ω (typ)
Switch Current Limit: 1.6 A (min, VIN = 3.6V)
Oscillator Frequency: 1 MHz (typ)
Feedback Voltage: 0.5 V (typ, VPS = VIN)
Thermal Shutdown: 140 °C (typ)

Features:

Single Inductor
Fixed Frequency Operation with Battery Voltages
Synchronous Rectification : Up to 90% Efficiency
Up to 800mA Continuous Output Current
VOUT Disconnected from VIN during Shutdown
Power Save Mode (PSM) Enable Control
<1 μA Shutdown Current
Input Voltage Range: 1.8V to 5.5V
Fixed 3.3V and Adjustable Output Voltage Options from 1.8V to 5.5V
10-Lead WDFN Packages
RoHS Compliant and Halogen Free

Applications:

Portable Products
Handheld Instrumentation

Package:

WDFN-10L 3x3
WDFN-10L 2.5x2.5

RT6150A/B Features

Single Inductor
Fixed Frequency Operation with Battery Voltages
Synchronous Rectification : Up to 90% Efficiency
Up to 800mA Continuous Output Current
VOUT Disconnected from VIN during Shutdown
Power Save Mode (PSM) Enable Control
<1 μ A Shutdown Current
Input Voltage Range: 1.8V to 5.5V
Fixed 3.3V and Adjustable Output Voltage Options from 1.8V to 5.5V
10-Lead WDFN Packages
RoHS Compliant and Halogen Free

A : WDFN-10L 3x3

B : WDFN-10L 2.5x2.5

RT6150A/B Pin Configuration

RT6150A/B Pinout

Package: 11-pin (includes exposed pad)

Pin Number	Pin Name	Pin Function
1	VOUT	Output of the Buck-Boost Converter. Connect a capacitor between VOUT and GND.
2	LX2	Second Switch Node. Connect this pin to the inductor.
3	GND	Power Ground.
4	LX1	First Switch Node. Connect this pin to the inductor.
5	VIN	Power Input. Connect an at least 10 µF capacitor between VIN and GND.
6	EN	Enable Control Input for the Buck-Boost Converter.
7	PS	PSM Control Input. Pull low for PSM operation and pull high for fixed switching frequency operation.
8	VINA	Supply Voltage Input for Control Circuit.
9	GND	Power Ground.
10	FB	Feedback Input. For adjustable versions, connect a resistive divider to set output voltage (1.8V to 5.5V); for fixed version, must be connected to VOUT.
11	GND	Power Ground (Exposed Pad). The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation.

Notes

GND pins (3, 9, 11): Pin 11 is the exposed pad on the bottom of the package and must be soldered to PCB ground for optimal thermal performance.
VIN capacitor: Minimum 10 µF required between VIN and GND.
VOUT capacitor: Required between VOUT and GND.
FB pin: Function depends on version—adjustable (resistive divider) or fixed (tied to VOUT).

RT6150A/B Absolute Maximum Ratings

VOUT, VIN, EN, PS, VINA, FB Pin ------------------------------------------------------------------------------------	- 0.3V to 6V
Switch Output Voltage, LX1, LX2 Pin ----------------------------------------------------------------------------------	- 0.3V to 6V
< 10ns-------------------------------------------------------------------------------------------------------------------------	- 2V to 7.5V
PowerDissipation,P D @T A = 25 ° C WDFN-103x3	--------------------------------------------------------------------------------------------------------------- 3.28W
WDFN-102.5x2.5 ----------------------------------------------------------------------------------------------------------	2.44W
Package Thermal Resistance (Note 2) WDFN-10 3x3, θ JA ----------------------------------------------------------------------------------------------------------	30.5 ° C/W
WDFN-10 3x3, θ JC ---------------------------------------------------------------------------------------------------------	7.5 ° C/W
WDFN-10 2.5x2.5, θ JA -----------------------------------------------------------------------------------------------------	40.9 ° C/W
WDFN-10 2.5x2.5, θ JC ----------------------------------------------------------------------------------------------------	18.6 ° C/W
Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------------	260 ° C
Junction Temperature------------------------------------------------------------------------------------------------------	150 ° C
StorageTemperatureRange ---------------------------------------------------------------------------------------------	- 65 ° Cto150 ° C
ESD Susceptibility (Note 3) HBM(HumanBodyModel)-----------------------------------------------------------------------------------------------	2kV
MM(Machine Model) ------------------------------------------------------------------------------------------------------	200V
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------ 1.8V JunctionTemperature Range---------------------------------------------------------------------------------------------	to 5.5V - 40 ° Cto125 ° C
AmbientTemperature Range---------------------------------------------------------------------------------------------	- 40 ° Cto 85 ° C

RT6150A/B Thermal Information

The device has a built-in temperature sensor which monitors the internal junction temperature. If the temperature exceeds the threshold, the device stops operating. As soon as the IC temperature has decreased below the threshold with a hysteresis, it starts operating again. The built-in hysteresis is designed to avoid unstable operation at IC temperatures near the over temperature threshold.

RT6150A/B Typical Application

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All Boost Converters datasheets All Richtek datasheets (17)

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