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ADP121CB-2.5-EVALZ View Datasheet(PDF) - Analog Devices

Part NameADP121CB-2.5-EVALZ ADI
Analog Devices ADI
Description150 mA, Low Quiescent Current, CMOS Linear Regulator
ADP121CB-2.5-EVALZ Datasheet PDF : 20 Pages
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ADP121
Data Sheet
Parameter
POWER SUPPLY REJECTION RATIO
Symbol
PSRR
Conditions
10 kHz, VIN = 5 V, VOUT = 3.3 V
10 kHz, VIN = 5 V, VOUT = 2.5 V
10 kHz, VIN = 5 V, VOUT = 1.2 V
Min Typ Max Unit
60
dB
66
dB
70
dB
1 Based on an end-point calculation using 1 mA and 100 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA.
2 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output
voltages above 2.3 V.
3 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value.
4 Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.
RECOMMENDED SPECIFICATIONS: INPUT AND OUTPUT CAPACITORS
Table 2.
Parameter
INPUT AND OUTPUT CAPACITOR1
Minimum Input and Output Capacitance
Capacitor ESR
Symbol
CMIN
RESR
Conditions
TA = −40°C to +125°C
TA = −40°C to +125°C
Min Typ Max Unit
0.70
0.001
µF
1
Ω
1 The minimum input and output capacitance should be greater than 0.70 μF over the full range of operating conditions. The full range of operating conditions in the
application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended;
Y5V and Z5U capacitors are not recommended for use with any LDO.
Rev. G | Page 4 of 20
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GENERAL DESCRIPTION
The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.
The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.
Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch halide-free WLCSP packages and utilizes the smallest footprint solution to meet a variety of portable applications.

FEATURES
  Input voltage range: 2.3 V to 5.5 V
  Output voltage range: 1.2 V to 3.3 V
  Output current: 150 mA
  Low quiescent current
     IGND = 11 μA with 0 μA load
     IGND = 30 μA with 150 mA load
  Low shutdown current: <1 μA
  Low dropout voltage
     90 mV @ 150 mA load
  High PSRR
     70 dB @ 1 kHz at VOUT = 1.2 V
     70 dB @ 10 kHz at VOUT = 1.2 V
  Low noise: 40 μV rms at VOUT = 1.2 V
  No noise bypass capacitor required
  Output voltage accuracy: ±1%
  Stable with a small 1 μF ceramic output capacitor
  Current limit and thermal overload protection
  Logic controlled enable
  5-lead TSOT package
  4-ball 0.4 mm pitch WLCSP
 
APPLICATIONS
  Mobile phones
  Digital cameras and audio devices
  Portable and battery-powered equipment
  Post dc-to-dc regulation
  Post regulation

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