Key facts
- Brand
- UNITRODE
- Model
- UC2525A
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-09
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Unitrode UC1525A/27A UC2525A/27A UC3525A/27A Regulating Pulse Width Modulator Datasheet
The UC1525A/27A, UC2525A/27A and UC3525A/27A are regulating pulse width modulator integrated circuits intended for switching power supply designs. The document lists features such as 8 to 35V operation, a 5.1V reference trimmed to ±1%, a 100Hz to 500kHz oscillator range, adjustable deadtime control, internal soft-start, pulse-by-pulse shutdown, and dual source/sink output drivers.
The datasheet provides absolute maximum ratings, recommended operating conditions, connection diagrams and pin functions, and electrical characteristics for the reference, oscillator, error amplifier, PWM comparator, shutdown and output driver sections. It also includes principles of operation, typical characteristics, shutdown options, oscillator and output circuit diagrams, and a lab test fixture.
UNITRODE UC2525A specifications
| Supply Voltage (+VIN), Absolute Maximum | +40 V |
|---|---|
| Recommended Input Voltage (+VIN) | +8 V to +35 V |
| Reference Output Voltage (UC1525A/UC2525A) | 5.05 V min, 5.10 V typ, 5.15 V max at TJ = 25°C |
| Oscillator Frequency Range, Recommended | 100 Hz to 400 kHz |
| Output Current, Source or Sink, Absolute Maximum | 500 mA |
| Operating Junction Temperature | -55°C to +150°C |
| Packages | DIL-16 (J or N), PLCC-20 and LCC-20 (Q or L) |
| Reference Output Current, Absolute Maximum | 50 mA |
Source: Unitrode UC1525A/27A UC2525A/27A UC3525A/27A Regulating Pulse Width Modulator Datasheet
All UNITRODE UC2525A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What input voltage range is recommended for the UC1525A/27A, UC2525A/27A and UC3525A/27A?
The recommended input voltage (+VIN) range is +8 V to +35 V.
From: Unitrode UC1525A/27A UC2525A/27A UC3525A/27A Regulating Pulse Width Modulator Datasheet
How is the reference output voltage specified at 25°C for the UC1525A/UC2525A?
At TJ = 25°C, the UC1525A/UC2525A reference output is specified as 5.05 V min, 5.10 V typ and 5.15 V max.
From: Unitrode UC1525A/27A UC2525A/27A UC3525A/27A Regulating Pulse Width Modulator Datasheet
What is the operating voltage range for these modulators?
The devices operate with a supply voltage range of 8 to 35V.
Does the UC1525A series include soft-start circuitry?
Yes, these devices feature built-in soft-start circuitry requiring only an external timing capacitor.