ADP7185ACPZN1.5-R7

LDO Regulator Neg -1.5V -0.5A 8Pin LFCSP EP T/R

Product Details

The ADP7185 is a complementary metal oxide semiconductor CMOS, low dropout LDO linear regulator that operates from −2.0 V to −5.5 V and provides up to −500 mA of output current. This high output current LDO is ideal for regulation of high performance analog and mixed signal circuits operating from −0.5 V down to −4.5 V. Using an advanced proprietary architecture, the ADP7185 provides high power supple rejection ratio PSRR and low noise, and it achieves excellent line and load transient response with a small 4.7 μF ceramic output capacitor.

The ADP7185 is available in 15 fixed output voltage options. The following voltages are available from stock: −0.5 V, −1.0 V, −1.2 V, −1.5 V, −1.8 V, −2.0 V, −2.5 V, −3.0 V, and −3.3 V.

Additional voltages available by special order are −0.8 V, −0.9 V, −1.3 V, −2.8 V, −4.2 V, and −4.5 V. An adjustable version is also available which allows output voltages that range from −0.5 V to −VIN \+ 0.5 V with an external feedback divider.

The enable logic feature is capable of interfacing with positive or negative logic levels for maximum flexibility.

The ADP7185 regulator output noise is 4 μV rms independent of the output voltage. The ADP7185 is available in an 8-lead, 2 mm × 2 mm LFCSP, making it not only a very compact solution but also providing excellent thermal performance for applications requiring up to −500 mA of output current in a small, low profile footprint.

**Applications**

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Regulation to noise sensitive applications: analog-to-digital converters ADCs, digital-to-analog converters DACs, precision amplifiers

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Communications and infrastructure

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Medical and healthcare

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Industrial and instrumentation

### Features and Benefits

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Input voltage range: −2.0 V to −5.5 V 

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Maximum output current: −500 mA

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Fixed output voltage options: −0.5 V to −4.5 V

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Adjustable output from −0.5 V to −VIN \+ 0.5 V

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Low output noise: 4 μV rms from 100 Hz to 100 kHz 

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Noise spectral density: 20 nV/√Hz, 10 kHz to 1 MHz 

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PSRR at −500 mA load 

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68 dB at 10 kHz 

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50 dB at 100 kHz 

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40 dB at 1 MHz 

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Low dropout voltage: −190 mV typical at −500 mA load 

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Initial output voltage VOUT accuracy: ±0.5% 

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Output voltage accuracy over line, load, and temperature: ±2.2%

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Operating supply current IGND: −0.6 mA typical at no load 

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Low shutdown current: −2 μA typical at VIN = −5.5 V

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Stable with small 4.7 μF ceramic input and output capacitor

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Positive or negative enable logic

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Current-limit and thermal overload protection

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8-lead, 2 mm × 2 mm LFCSP package

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Supported by simPOWER voltage regulator design tool