Overview
The LM3691TL-1.0/NOPB, produced by Texas Instruments, is a high-efficiency, miniature 1-A step-down DC-DC converter. This device is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or three-cell NiMH/NiCd batteries. It features a voltage mode architecture with synchronous rectification, enabling it to deliver up to 1000 mA of load current. The LM3691 is designed for use in portable devices such as mobile phones, hand-held radios, MP3 players, and portable hard disk drives, where high efficiency and compact size are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 5.5 V | V |
| Output Voltage | 0.75 V to 3.3 V (1.0 V for LM3691TL-1.0/NOPB) | V |
| Maximum Load Current | 1000 mA | A |
| Switching Frequency | 4 MHz | Hz |
| Quiescent Current in ECO Mode | 64 μA (typical) | μA |
| Quiescent Current in PWM Mode | 490 μA (typical) | μA |
| Shutdown Supply Current | 0.03 μA (typical) | μA |
| Package Type | 6-pin DSBGA | - |
| Package Size | 1.59 mm × 1.295 mm | mm |
Key Features
- High accuracy with ±1% DC output voltage precision
- Automatic ECO/PWM mode switching for optimal efficiency
- MODE pin to select ECO or Forced PWM mode
- Current overload and thermal shutdown protections
- Soft start and undervoltage protection
- Only three external surface-mount components required (inductor, input capacitor, and output capacitor)
- Compact solution size less than 15 mm^2
Applications
- Mobile Phones
- Hand-Held Radios
- MP3 Players
- Portable Hard Disk Drives
Q & A
- What is the input voltage range of the LM3691TL-1.0/NOPB? The input voltage range is from 2.3 V to 5.5 V.
- What is the output voltage of the LM3691TL-1.0/NOPB? The output voltage is 1.0 V.
- What is the maximum load current of the LM3691TL-1.0/NOPB? The maximum load current is 1000 mA.
- What is the switching frequency of the LM3691TL-1.0/NOPB? The switching frequency is 4 MHz.
- What is the quiescent current in ECO mode? The quiescent current in ECO mode is typically 64 μA.
- How does the LM3691TL-1.0/NOPB switch between ECO and PWM modes? The device automatically switches between ECO and PWM modes based on the load current.
- What protections does the LM3691TL-1.0/NOPB have? The device has current overload and thermal shutdown protections.
- What is the package type and size of the LM3691TL-1.0/NOPB? The package type is 6-pin DSBGA, and the size is 1.59 mm × 1.295 mm.
- How many external components are required for the LM3691TL-1.0/NOPB? Only three external surface-mount components are required: an inductor, an input capacitor, and an output capacitor.
- What are some typical applications of the LM3691TL-1.0/NOPB? Typical applications include mobile phones, hand-held radios, MP3 players, and portable hard disk drives.
