40 V, 200 mA, Low Noise,
CMOS LDO Linear Regulator
ADP7142
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,
ADP7142
V
= 6V
V
= 5V
OUT
IN
VIN
VOUT
C
C
OUT
2.2µF
VOUT ≤ 5 V, VIN = 7 V
IN
2.2µF
Input voltage range: 2.7 V to 40 V
Maximum output current: 200 mA
Initial accuracy: 0.8ꢀ
Accuracy over line, load, and temperature
−1.2ꢀ to +1.5ꢀ, TJ = −40°C to +85°C
1.8ꢀ, TJ = −40°C to +125°C
SENSE/ADJ
ON
EN
SS
C
1nF
GND
SS
OFF
Figure 1. ADP7142 with Fixed Output Voltage, 5 V
Low dropout voltage: 200 mV (typical) at a 200 mA load,
ADP7142
V
= 7V
V
= 6V
IN
OUT
VOUT = 5 V
VIN
VOUT
C
C
OUT
2.2µF
User programmable soft start (LFCSP and SOIC only)
Low quiescent current, IGND = 50 ꢁA (typical) with no load
Low shutdown current: 1.8 ꢁA at VIN = 5 V, 3.0 ꢁA at VIN = 40 V
Stable with a small 2.2 μF ceramic output capacitor
Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V
15 standard voltages between 1.2 V and 5.0 V are
available
IN
2kΩ
2.2µF
SENSE/ADJ
10kΩ
ON
EN
SS
C
GND
SS
1nF
OFF
Figure 2. ADP7142 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
2 mm × 2 mm, 6-lead LFCSP, 8-Lead SOIC, 5-Lead TSOT
Supported by ADIsimPower tool
APPLICATIONS
Regulation to noise sensitive applications
ADC, DAC circuits, precision amplifiers, power for
VCO VTUNE control
Communications and infrastructure
Medical and healthcare
Industrial and instrumentation
(adjustable), 1.8 V, 2.5 V, 3.3 V, 3.8 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, 4.2 V, and 4.6 V.
GENERAL DESCRIPTION
The ADP7142 is a CMOS, low dropout (LDO) linear regulator
that operates from 2.7 V to 40 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 39 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 ADP7142 regulator output noise is 11 ꢀV rms
independent of the output voltage for the fixed options of 5 V
or less.
Each fixed output voltage can be adjusted above the initial set
point with an external feedback divider. This allows the ADP7142
to provide an output voltage from 1.2 V to VIN − VDO with high
PSRR and low noise.
User programmable soft start with an external capacitor is
available in the LFCSP and SOIC packages.
The ADP7142 is available in a 6-lead, 2 mm × 2 mm LFCSP
making it not only a very compact solution, but it also provides
excellent thermal performance for applications requiring up to
200 mA of output current in a small, low profile footprint. The
ADP7142 is also available in a 5-lead TSOT and an 8-lead SOIC.
The ADP7142 is available in 15 fixed output voltage options.
The following voltages are available from stock: 1.2 V
Rev. H
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