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PDF ADP121 Data sheet ( Hoja de datos )
| Número de pieza | ADP121 | |
| Descripción | CMOS Linear Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADP121 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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Data Sheet
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
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.
150 mA, Low Quiescent Current,
CMOS Linear Regulator
ADP121
TYPICAL APPLICATION CIRCUITS
VIN = 2.3V
CIN
1µF
1 VIN VOUT 5
VOUT = 1.8V
2 GND
COUT
1µF
ON 3 EN
NC 4
OFF
NC = NO CONNECT
Figure 1. ADP121 TSOT with Fixed Output Voltage, 1.8 V
VIN = 2.3V
CIN
1µF
VOUT = 1.8V
VIN VOUT
COUT
1µF
ON
OFF
EN
GND
Figure 2. ADP121 WLCSP with Fixed Output Voltage, 1.8 V
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.
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2012 Analog Devices, Inc. All rights reserved.
1 page  
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
1Ω
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
5 Page 
ADP121
1mA TO 150mA LOAD STEP,
2.5A/µs
ILOAD
VOUT
VIN = 5V
VOUT = 1.8V
(40µs/DIV)
Figure 23. Load Transient Response, CIN = COUT = 1 μF
1mA TO 150mA LOAD STEP,
2.5A/µs
ILOAD
VOUT
VIN = 5V
VOUT = 1.8V
(40µs/DIV)
Figure 24. Load Transient Response, CIN = COUT = 4.7 μF
Data Sheet
VIN
4V TO 5V INPUT VOLTAGE STEP,
2V/µs
VOUT
VOUT = 1.8V,
CIN = COUT = 1µF
(4µs/DIV)
Figure 25. Line Transient Response, Load Current = 150 mA
VOUT = 1.8V,
CIN = COUT = 1µF
VIN
4V TO 5V INPUT VOLTAGE STEP,
2V/µs
VOUT
(10µs/DIV)
Figure 26. Line Transient Response, Load Current = 1 mA
Rev. G | Page 10 of 20
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet ADP121.PDF ] | |
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