RT6150A
Current Mode Buck-Boost ConverterThe RT6150A is a current mode buck-boost converter from Richtek. View the full RT6150A datasheet below including key specifications, absolute maximum ratings.
Official RT6150A datasheet (PDF) — the source this page was extracted from.
RT6150A Key Specifications
| Parameter | Value |
|---|---|
| Peak Efficiency | up to 90% |
| Soft-Start Time | 0.65ms typ (1ms max) |
| Feedback Voltage | 0.5V (0.495V to 0.505V) |
| N-MOSFET RDS(On) | 0.15Ω typ |
| P-MOSFET RDS(On) | 0.15Ω typ |
| Shutdown Current | 0.1µA typ (1µA max) |
| Thermal Shutdown | 140°C |
| Package Dimensions | 3mm x 3mm |
| Input Voltage Range | 1.8V to 5.5V |
| Switching Frequency | 1MHz (0.8MHz to 1.2MHz) |
| Output Voltage Range | 1.8V to 5.5V (adjustable); fixed 3.3V option |
| Switch Current Limit | 1.6A min |
| Quiescent Current (PSM) | 60µA typ |
| Thermal Resistance θJA | 30.5°C/W (WDFN-10L 3x3) |
| Continuous Output Current | up to 800mA |
| Operating Ambient Temperature | -40°C to 85°C |
| Operating Junction Temperature | -40°C to 125°C |
RT6150A 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 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 Pin Configuration
| Pin No. | Pin Name | Pin Function |
|---|---|---|
| 1 | VOUT | Output of the Buck-Boost Converter. Connect a capacitor between the VOUT and GND. |
| 2 | LX2 | Second Switch Node. Connect this pin to the inductor. |
| 3, 9, 11 (Exposed Pad) | GND | Power Ground. The exposed pad must be soldered to a large PCB and connected to GNDfor maximum power dissipation. |
| 4 | LX1 | First Switch Node. Connect this pin to the inductor. |
| 5 | VIN | Power Input. Connect an at least 10 F capacitor between the VIN pin 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. |
| 10 | FB | Feedback Input. For adjustable versions, connect a resistive divider to set the output voltage and it can be adjusted from 1.8V to 5.5V; For fixed version, must be connected to VOUT. |
RT6150A 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 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 Typical Application
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