ADP1712ADP1713ADP1714中文pdf下载中文datasheet资料下载

ADP1712ADP1713ADP1714中文pdf下载中文datasheet资料下载

FEATURES

Maximum output current: 300 mA Input voltage range: 2.5 V to 5.5 V Light load efficient

IGND = 75 μA with 100 μA load Low shutdown current: <1 μA

Very low dropout voltage: 170 mV @ 300 mA load Initial accuracy: ±1%

Accuracy over line, load, and temperature: ±2% 16 fixed output voltage options with soft start: 0.75 V to 3.3 V (ADP1712)

Adjustable output voltage option: 0.8 V to 5.0 V (ADP1712 Adjustable)

16 fixed output voltage options with reference bypass: 0.75 V to 3.3 V (ADP1713)

16 fixed output voltage options with tracking: 0.75 V to 3.3 V (ADP1714) Low output noise: 40 μV rms High PSRR: 72 dB @ 1 kHz

Stable with small 2.2 μF ceramic output capacitor Excellent load/line transient response

Current limit and thermal overload protection Logic controlled enable 5-lead TSOT package

APPLICATIONS

Mobile phones

Digital camera and audio devices

Portable and battery-powered equipment Post dc-dc regulation

GENERAL DESCRIPTION

The ADP1712/ADP1713/ADP1714, available in a tiny, 5-lead TSOT package, are low dropout linear regulators that operate from 2.5 V to 5.5 V and provide up to 300 mA of output current. The low 170 mV dropout voltage at a 300 mA load improves efficiency and allows operation over a wide input voltage range. Using a novel scaling architecture, ground current is a very low 75 μA when driving a 100 μA load, making the ADP1712/ ADP1713/ADP1714 ideal for battery-operated portable equipment. The ADP1712/ADP1713/ADP1714 are available in 16 fixed output voltage options. The ADP1712 is also available in an adjustable version, which allows output voltages that range from 0.8 V to 5 V via an external divider. The ADP1712 fixed version allows an external capacitor to be connected to program the

Rev. A

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300 mA, Low DropoutCMOS Linear RegulatorADP1712/ADP1713/ADP1714

TYPICAL APPLICATION CIRCUITS

Figure 1. ADP1712 with Fixed Output Voltage and Soft-Start Capacitor, 3.3 V

ADP1712

2

0-055460Figure 2. ADP1712 with Adjustable Output Voltage, 0.8 V to 5.0 V

3

00-55460Figure 3. ADP1713 with Fixed Output Voltage and Bypass Capacitor, 0.75 V

VOUT (V)321

4

0123450-5V5TRK (V)

460Figure 4. ADP1714 with Output Voltage Tracking

soft-start time. The ADP1713 allows a reference bypass capacitor to be connected, which reduces output voltage noise and improves power supply rejection. The ADP1714 includes a tracking feature, which allows the output to follow an external voltage rail or reference.

The ADP1712/ADP1713/ADP1714 are optimized for stable operation with small 2.2 μF ceramic output capacitors, allowing good transient performance while occupying minimal board space. An enable pin controls the output voltage on all devices, and an undervoltage lockout circuit disables the regulator if IN drops below a minimum threshold. The parts also have short circuit protection and thermal overload protection, which prevent damage to the devices in adverse conditions.

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