MT3608
Voltage Regulators - DC DC Switching Regulators
Technical Specifications
| Type | Description |
|---|---|
| Output Type | Adjustable |
| Output Voltage | 14.3 V |
| Output Current | 2 A |
| Function | Boost |
| Working Voltage V | 13 V |
| Switching Freq Hz | 1.2 MHz |
| Channels | 1 |
| Type | Description |
|---|---|
| Iq A | 0.001 A |
| Switch tube (built-in/external) | Built-in |
| Operating Temp | -40°C ~ +85°C |
| Features | Light load efficient mode;Overcurrent Protection |
| Topology | Boost |
| Package / Case | SOT-23-6 |
Product Introduction
MT3608 is a constant-frequency, current-mode boost converter in a 6-pin SOT23 package, designed for small, low-power applications. The device operates at a switching frequency of 1.2MHz, allowing the use of tiny, low-cost inductors and capacitors with heights no greater than 2mm. The internal soft-start function reduces inrush current and extends battery life. The MT3608 features automatic switchover to pulse frequency modulation mode at light loads, and integrates UVLO, current limiting, and thermal overload protection to prevent device damage under output overload conditions.
Features
- Integrated 80mΩ power MOSFET
- 2V to 24V input voltage range
- 1.2MHz fixed switching frequency
- Internal 4A switch current limit
- Adjustable output voltage
- Internal compensation
- Up to 28V output voltage
- Automatic pulse frequency modulation mode at light load
- Up to 93% efficiency
- 6-pin SOT23-6 package
Applications
- - Battery-powered devices - Set-top boxes - LCD bias power supplies - DSL and cable modems and routers - Network cards powered by PCI or PCI Express slots
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Frequently Asked Questions
What are the core electrical ratings and package characteristics of the MT3608 boost converter?
The MT3608 is a constant-frequency, current-mode step-up (boost) DC-DC converter intended for small, low-power applications. It operates over an input voltage range of 2V to 24V and provides an adjustable output voltage up to 28V. The device operates at a fixed 1.2MHz switching frequency, allowing the use of compact external inductors and capacitors. It integrates an 80mΩ internal power MOSFET with a 4A internal switch current limit and is available in a 6-pin SOT23-6 package.
Which external components are required for a stable MT3608 boost converter design?
A typical MT3608 boost converter requires an inductor, Schottky diode, input capacitor, output capacitor, and an external resistor divider to set the output voltage. The recommended inductor value is 4.7µH to 22µH. The datasheet recommends 22µF low-ESR ceramic capacitors (X5R or X7R) for both the input and output. A Schottky diode is recommended because of its low forward voltage drop and fast recovery, improving efficiency at the converter's 1.2MHz switching frequency. The output voltage is programmed using an external resistor divider referenced to the 0.6V feedback voltage.
How does the MT3608 regulate efficiency and performance under different load conditions?
The MT3608 uses a fixed-frequency, peak current-mode control architecture to regulate output voltage. It operates at a 1.2MHz switching frequency and automatically shifts to Pulse Frequency Modulation (PFM) mode under light-load conditions to improve efficiency. Typical quiescent current in PFM mode is 100–200µA, and the converter achieves up to 93% efficiency, depending on operating conditions and external component selection. Internal soft-start helps reduce inrush current during startup, while current limiting and thermal protection improve reliability during operation.
Sourcing Information
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