Datasheet ADP1715, ADP1716 (Analog Devices)

500 mA, Low Dropout, CMOS Linear Regulator ADP1715/ADP1716 FEATURES TYPICAL APPLICATION CIRCUITS Maximum output current: 500 mA ADP1715 Input voltage range: 2.5 V to 5.5 V Low shutdown current: <1 μA 1 EN GND 8 V 2 IN = 5V IN GND 7 Low dropout voltage: 2.2µF 3 OUT GND 6 250 mV @ 500 mA load 4 SS GND 5 V 50 mV @ 100 mA load OUT = 3.3V
01 0
2.2µF 10nF
0-
Initial accuracy: ±1%
11 06
Accuracy over line, load, and temperature: ±3%
Figure 1. ADP1715 with Fixed Output Voltage, 3.3 V
16 fixed output voltage options with soft start: 0.75 V to 3.3 V (ADP1715) ADP1715 ADJUSTABLE Adjustable output voltage option: 0.8 V to 5.0 V 1 EN GND 8 (ADP1715 Adjustable) V 2 IN GND 7 IN = 5V 16 fixed output voltage options with tracking: 3 2.2µF OUT GND 6 0.75 V to 3.3 V (ADP1716) R1 4 ADJ GND 5 VOUT = 0.8(1 + R1/R2) Stable with small 2.2 μF ceramic output capacitor
2
2.2µF R2
-00 0
Excellent load/line transient response
11 06
Current limit and thermal overload protection
Figure 2. ADP1715 with Adjustable Output Voltage, 0.8 V to 5.0 V
Logic controlled enable 8-lead thermally enhanced MSOP package ADP1716 VOUT (V) APPLICATIONS 1 EN GND 8 3 V Notebook computers 2 IN GND 7 IN = 5V 2 2.2µF 3 OUT GND 6 Memory components 1 4 TRK GND 5 V Telecommunications equipment OUT
3
0 2.2µF 1 2 3 4 5
-00
Network equipment VTRK = 0V TO 5V V
110
TRK (V)
06
DSP/FPGA/μP supplies
Figure 3. ADP1716 with Output Voltage Tracking
Instrumentation equipment/data acquisition systems GENERAL DESCRIPTION
The ADP1715/ADP1716 are low dropout, CMOS linear between 0.75 V and 3.3 V; the adjustable output voltage can regulators that operate from 2.5 V to 5.5 V and provide up to be set to any value between 0.8 V and 5.0 V by an external 500 mA of output current. Using an advanced proprietary voltage divider connected from OUT to ADJ. The variable architecture, they provide high power supply rejection and soft start uses an external capacitor at SS to control the achieve excellent line and load transient response with just a output voltage ramp. Tracking limits the output voltage to small 2.2 μF ceramic output capacitor. the at-or-below voltage at the TRK pin. Three versions of this part are available, one with fixed The ADP1715/ADP1716 are available in 8-lead thermally output voltage options and variable soft start (ADP1715), enhanced MSOP packages, making them not only a very one with adjustable output voltage and fixed soft start compact solution but also providing excellent thermal (ADP1715 Adjustable), and one with voltage tracking in performance for applications requiring up to 500 mA of output fixed output voltage options (ADP1716). The fixed output current in a small, low profile footprint. voltage options are internally set to one of sixteen values
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION SOFT-START FUNCTION (ADP1715) ADJUSTABLE OUTPUT VOLTAGE (ADP1715 ADJUSTABLE) TRACK MODE (ADP1716) ENABLE FEATURE APPLICATION INFORMATION CAPACITOR SELECTION CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE