ADP1720 50 mA, High Voltage, Micropower Linear Regulator

The ADP1720 is a high voltage, micropower, low dropout linear regulator. Operating over a very wide input voltage range of 4 V to 28 V, the ADP1720 can provide up to 50 mA of output current. With just 28 μA of quiescent supply current and a micropower shutdown mode, this device is ideal for applications that require low quiescent current.

The ADP1720 is available in fixed output voltages of 3.3 V and 5.0 V. An adjustable version is also available, which allows the output to be set anywhere between 1.225 V and 5.0 V. An enable function that allows external circuits to turn on and turn off the ADP1720 output is available. For automatic startup, the enable (EN) pin can be connected directly to the input rail.

The ADP1720 is optimized for stable operation with small 1 μF ceramic output capacitors, allowing for good transient performance while occupying minimal board space.

The ADP1720 operates from –40°C to +125°C and uses current limit protection and thermal overload protection circuits to prevent damage to the device in adverse conditions.

Available in a small thermally enhanced MSOP package, the ADP1720 provides a compact solution with low thermal resistance.

Applications

DC-to-DC post regulation
PCMCIA regulation
Keep-alive power in portable equipment
Industrial applications

Features and Benefits

Wide input voltage range:
4 V to 28 V
Maximum output current: 50 mA
Low light load current:
28 μA at 0 μA load
35 μA at 100 μA load
Low shutdown current: 0.7 μA
Low dropout voltage:
275 mV @ 50 mA load
Initial accuracy: ±0.5%
Accuracy over line, load, and temperature: ±2%
Stable with small 1μF ceramic output capacitor

Fixed 3.3 V and 5.0 V output voltage options
Adjustable output voltage option: 1.225 V to 5.0 V
Current limit and thermal overload protection
Logic controlled enable
Download ADP1720-EP Data Sheet (pdf)
Enhanced processing (EP) for −55°C to +125°C operation
V62/12648 DSCC Drawing Number

Power Management

Linear Regulators

Building Technology

White Goods and Vending
Building Control and Automation
Heating Ventilation and Air Conditioning

Design Tools

ADI Linear Regulator Design Tool and Parametric Search .

Reference Designs

Data Sheets

Document	note
ADP1720: 50 mA, High Voltage, Micropower Linear Regulator Data Sheet (Rev. A)	PDF 363 kB
ADP1720-EP: Enhanced Product Data Sheet (Rev. A)	PDF 898.47 K
ADP1720-DSCC: Military Data Sheet

Application Notes

Document	note
AN-1328: High Performance, Low Noise Studio Microphone with MEMS Microphones, Analog Beamforming, and Power Management (Rev. A)	PDF 342.87 K
AN-1072: How to Successfully Apply Low Dropout Regulators	PDF 105 kB

User Guides

Document	note
UG-181: PLC Demo System, Industrial Process Control Demo System (Rev. A)	PDF 495.24 K

Frequently Asked Questions

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADP1720ARMZ-3.3-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	0.62	Y
ADP1720ARMZ-5-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	0.62	Y
ADP1720ARMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	0.62	Y
ADP1720TRMZ-EP Production	8 ld MSOP	OTH 50	-55 to 125C	2.19	1.98	Y
ADP1720TRMZ-EP-R7 Production	8 ld MSOP	REEL 1000	-55 to 125C	0	1.98	Y
ADP1720TRMZ3.3-EP Production	8 ld MSOP	OTH 50	-55 to 125C	1.11	1.01	Y
ADP1720TRMZ3.3EPR7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	1.01	Y
ADP1720TRMZ5-EP Production	8 ld MSOP	OTH 50	-55 to 125C	1.11	1.01	Y
ADP1720TRMZ5-EP-R7 Production	8 ld MSOP	REEL 1000	-55 to 125C	0	1.01	Y