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PDF AAT3236IGV-33-T1 Data sheet ( Hoja de datos )
| Número de pieza | AAT3236IGV-33-T1 | |
| Descripción | 300mA CMOS High Performance LDO | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AAT3236IGV-33-T1 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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AAT3236
300mA CMOS High Performance LDO
General Description
Features
PowerLinear™
The AAT3236 is a MicroPower™ Low Dropout
Linear Regulator designed to deliver a continuous
300mA output load current and is capable of han-
dling short duration current peaks up to 500mA.
With a very small footprint SOT23-5 package it is
ideally suited for portable applications where low
noise, high power supply ripple rejection, extended
battery life and small size are critical. The AAT3236
features fast transient response and low output self
noise for powering sensitive RF circuitry. Other fea-
tures include low quiescent current, typically
100µA, and low dropout voltage, typically 300mV at
full output load current. The device has internal out-
put short circuit protection and thermal shutdown to
prevent damage under extreme conditions.
The AAT3236 also features a low-power shutdown
mode for longer battery life. A bypass pin is pro-
vided to improve PSRR performance by connect-
ing an external capacitor from the AAT3236's refer-
ence output to ground.
The AAT3236 is available in a space saving
SOT23-5 or SC70JW-8 package in 7 factory pro-
grammed voltages of 2.5V, 2.7V, 2.8V, 2.85V, 3.0V,
3.3V, or 3.5V.
• 500mA Peak Output Current
• Low Dropout - Typically 300mV at 300mA
• Guaranteed 300mA Output
• High accuracy ±1.5%
• 100µA Quiescent Current
• High Power Supply Ripple Rejection
• 70 dB at 1kHz
• 50 dB at 10kHz
• Very low self noise 45µVrms/rtHz
• Noise reduction bypass capacitor
• Short circuit protection
• Over-Temperature protection
• Shutdown mode for longer battery life
• Low temperature coefficient
• 7 Factory programmed output voltages
• SOT-23 5-pin or SC70JW 8-pin package
Applications
• Cellular Phones
• Notebook Computers
• Portable Communication Devices
• Personal Portable Electronics
Typical Application
VIN
IN AAT3236 OUT
VOUT
ON/OFF
1µF
EN
GND
BYP
10nF
2.2µF
GND
GND
3236.2001.11.0.9
1
1 page  
AAT3236
300mA CMOS High Performance LDO
On/Off Transient Response
No CBYP Capacitor
EN (2v/div)
10mA
VOUT (1v/div)
150mA
300mA
100µs/div
Line Transient Response
3.20
3.15
3.10
3.05
3.00
2.95
2.90
5µs/div
6
5
4
3
2
1
0
Short Circuit Current
1.2
1
0.8
0.6
0.4
0.2
0
10ms/div
3236.2001.11.0.9
On/Off Transient Response
CBYP=10nF
EN (2V/div)
150mA
10mA
VOUT (1V/div)
300mA
5ms/div
Load Transient Response
3.10
3.05
3.00
2.95
2.90
2.85
2.80
100 µS/div
1200
1000
800
600
400
200
0
Power Supply Rejection Ratio
vs. Frequency
90
80
70
60 4.7µF
10µF
2.2µF
50
40
1.0µF
30
10 100 1k 10k 100k 1m 10m
Frequency (Hz)
5
5 Page 
AAT3236
300mA CMOS High Performance LDO
VIN = 4.2 volts
VOUT = 3.0 volt
%DC = 100(PD(MAX)/((VIN-VOUT)IOUT+(VINxIGND))
%DC = 100(526mW/((4.2V-3.0V)500mA+(4.2Vx150µA))
%DC = 87.57%
For a 500mA output current and a 1.2 volt drop
across the AAT3236 at an ambient temperature of
25°C, the maximum on time duty cycle for the
device would be 87.57%.
The following family of curves show the safe oper-
ating area for duty cycled operation from ambient
room temperature to the maximum operating level.
High Peak Output Current Applications
Some applications require the LDO regulator to
operate at a continuous nominal level with short
duration high current peaks. The duty cycles for
both output current levels must be taken into
account. To do so, one would first need to calcu-
late the power dissipation at a nominal continuous
level and then factor in the additional power dissi-
pation due to the short duration high current peaks.
For example, a 3.3V system using a AAT3236IGV-
3.3-T1 operates at a continuous 100mA load current
level and has short 500mA current peaks. The cur-
rent peak occurs for 378µs out of a 4.61ms period.
It will be assumed the input voltage is 4.2V.
Device Duty Cycle vs. VDROP
VOUT = 2.5V @ 25 degrees C
3.5
3
2.5 500 mA
200 mA
2
1.5 400 mA
1 300 mA
0.5
0
0 10 20 30 40 50 60 70 80 90 100
Duty Cycle (%)
Device Duty Cycle vs. V DROP
VOUT = 2.5V @ 85 degrees C
3.5
3
2.5
2 200 mA
1.5
1 500 mA
0.5
400 mA
300 mA
0
0 10 20 30 40 50 60
70
Duty Cycle (%)
100 mA
80 90 100
3236.2001.11.0.9
Device Duty Cycle vs. VDROP
VOUT = 2.5V @ 50 degrees C
3.5
3
2.5 500 mA
200 mA
100 mA
2
1.5 400 mA
1 300 mA
0.5
0
0 10 20 30 40 50 60 70 80 90 100
Duty Cycle (%)
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AAT3236IGV-33-T1.PDF ] | |
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