Overview
The ADP2139ACBZ-2.5-R7, produced by Analog Devices Inc., is a high-efficiency, low quiescent current, synchronous step-down DC-DC converter. This component is part of the ADP2138 and ADP2139 series, with the ADP2139 featuring an integrated discharge switch. It is designed to operate with a minimal number of external components, making it ideal for space-constrained applications. The converter supports both forced PWM and automatic PWM/PSM modes, ensuring optimal performance across various load conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.3 | 5.5 | V | |
| Output Voltage | 2.5 | V | ||
| Output Current | 0.8 | A | ||
| Undervoltage Lockout Threshold (VIN rising) | 2.00 | 2.15 | 2.25 | V |
| Output Voltage Accuracy (PWM mode) | -2 | +2 | % | |
| Line Regulation (VIN = 2.3 V to 5.5 V, PWM mode) | 0.25 | %/V | ||
| Load Regulation (ILOAD = 0 mA to 800 mA, PWM mode) | -0.95 | %/A | ||
| DC Operating Current (ILOAD = 0 mA, device not switching) | 23 | 30 | μA | |
| Shutdown Current (EN = 0 V, TA = TJ = -40°C to +85°C) | 0.2 | 1.0 | μA | |
| SW On Resistance (PFET) | 155 | 240 | mΩ | |
| SW On Resistance (NFET) | 115 | 200 | mΩ | |
| Current Limit (PFET switch peak current limit) | 1100 | 1500 | 1650 | mA |
| Oscillator Frequency | 2.6 | 3.0 | 3.4 | MHz |
| Start-Up Time | 250 | μs | ||
| Thermal Shutdown Threshold | 150 | °C |
Key Features
- High efficiency, low quiescent current synchronous step-down DC-DC converter
- Integrated discharge switch (ADP2139)
- Forced PWM and automatic PWM/PSM modes
- Low peak-to-peak ripple in PWM mode for noise-sensitive loads
- Ultralow shutdown current: 0.2 μA (typical)
- Current overload and thermal shutdown protections
- Fixed frequency, current-mode PWM control architecture
- Power save mode at light loads to lower regulation power losses
- Supported by ADIsimPower™ design tool
- Minimal external components required (three tiny external components)
Applications
- PDAs and palmtop computers
- Wireless handsets
- Digital audio and portable media players
- Digital cameras and GPS navigation units
Q & A
- What is the input voltage range of the ADP2139ACBZ-2.5-R7? The input voltage range is from 2.3 V to 5.5 V.
- What is the output voltage of the ADP2139ACBZ-2.5-R7? The output voltage is 2.5 V.
- What is the maximum output current of the ADP2139ACBZ-2.5-R7? The maximum output current is 0.8 A.
- Does the ADP2139ACBZ-2.5-R7 have an integrated discharge switch? Yes, the ADP2139 has an integrated discharge switch.
- What are the operating modes of the ADP2139ACBZ-2.5-R7? The ADP2139 operates in both forced PWM and automatic PWM/PSM modes.
- What is the typical shutdown current of the ADP2139ACBZ-2.5-R7? The typical shutdown current is 0.2 μA.
- What is the oscillator frequency of the ADP2139ACBZ-2.5-R7? The oscillator frequency is between 2.6 MHz and 3.4 MHz.
- What is the thermal shutdown threshold of the ADP2139ACBZ-2.5-R7? The thermal shutdown threshold is 150°C.
- What are some typical applications of the ADP2139ACBZ-2.5-R7? Typical applications include PDAs, wireless handsets, digital audio and portable media players, and digital cameras.
- Is the ADP2139ACBZ-2.5-R7 supported by any design tools? Yes, it is supported by the ADIsimPower™ design tool.
