20 V, 200 mA, Low Noise,
CMOS LDO Linear Regulator
ADP7112
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUITS
Low noise: 11 μV rms independent of fixed output voltage
PSRR of 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz,
ADP7112
V
= 6V
V
= 5V
OUT
IN
VIN
VOUT
VOUT = 5 V, VIN = 7 V
C
C
OUT
2.2µF
IN
2.2µF
Input voltage range: 2.7 V to 20 V
Maximum output current: 200 mA
Initial accuracy: 0.8ꢀ
Accuracy over line, load, and temperature
1.8ꢀ, TJ = −40°C to +125°C
SENSE/ADJ
ON
EN
SS
C
GND
SS
OFF
1nF
Figure 1. ADP7112 with Fixed Output Voltage, 5 V
Low dropout voltage: 200 mV (typical) at a 200 mA load,
V
OUT = 5 V
ADP7112
V
= 7V
V
= 6V
User-programmable soft start
Low quiescent current, IGND = 50 ꢁA (typical) with no load
Low shutdown current
IN
OUT
VIN
VOUT
C
C
OUT
2.2µF
IN
2kΩ
2.2µF
SENSE/ADJ
10kΩ
ON
1.8 ꢁA at VIN = 5 V
3.0 ꢁA at VIN = 20 V
Stable with a small 2.2 μF ceramic output capacitor
Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, and 5.0 V
15 standard voltages between 1.2 V and 5.0 V are
available
EN
SS
C
1nF
GND
SS
OFF
Figure 2. ADP7112 with 5 V Output Adjusted to 6 V
Adjustable output from 1.2 V to VIN – VDO, output can be
adjusted above initial set point
Precision enable
1 mm × 1.2 mm, 6-ball WLCSP
APPLICATIONS
Regulation to noise sensitive applications
ADC and DAC circuits, precision amplifiers, power for
VCO VTUNE control
Communications and infrastructure
Medical and healthcare
Industrial and instrumentation
GENERAL DESCRIPTION
The ADP7112 is a CMOS, low dropout (LDO) linear regulator
that operates from 2.7 V to 20 V and provides up to 200 mA of
output current. This high input voltage LDO is ideal for the
regulation of high performance analog and mixed-signal circuits
operating from 19 V down to 1.2 V rails. Using an advanced
proprietary architecture, the device provides high power supply
rejection, low noise, and achieves excellent line and load transient
response with a small 2.2 μF ceramic output capacitor. The
ADP7112 regulator output noise is 11 ꢀV rms, independent of
the output voltage for the fixed options of 5 V or less.
The ADP7112 is available in 15 fixed output voltage options.
The following voltages are available from stock: 1.2 V
(adjustable), 1.8 V, 2.5 V, 3.3 V, and 5.0 V. Additional voltages
available by special order are 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.75 V,
2.8 V, 2.85 V, 3.8 V, 4.2 V, and 4.6 V.
Each fixed output voltage can be adjusted above the initial set
point with an external feedback divider. This allows the ADP7112
to provide an output voltage from 1.2 V to VIN − VDO with high
PSRR and low noise.
A user-programmable soft start with an external capacitor is
available in the ADP7112. The ADP7112 is available in a 6-ball
1 mm × 1.2 mm WLCSP, making it a very compact solution.
Rev. D
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