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PDF AIC1952 Data sheet ( Hoja de datos )
| Número de pieza | AIC1952 | |
| Descripción | Low-Dropout 300mA Linear Regulator | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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AIC1952
Dual Output Low ESR Cap. Low-Dropout
FEATURES
Up to 300mA Output Current for Each LDO.
Low Quiescent Current ： 50µA (VOUT1 and
VOUT2 Enable Mode).
Low Dropout：200mV at 300mA Load Current
and 3.3V Output Voltage.
High PSRR：70dB at 1kHz.
Independent Shutdown Controls.
Current Limit and Thermal Protection.
Tiny SOT-23-6, DFN 6L-2X2 Package.
APPLICATIONS
Cellular Phones.
PDAs.
Digital Still Cameras.
Portable Consumer Equipments.
300mA Linear Regulator
DESCRIPTION
The AIC1952 is a dual output linear regulator
in a tiny SOT-23-6, DFN 6L-2X2 package. It is
optimized for low ESR ceramic capacitors
operation and up to 300mA continuous current
on each output.
The AIC1952 offers high precision output
voltage of 2%. At 300mA load current, a
200mV dropout is performed when output
voltage is equal to 3.3V. The quality of low
quiescent current and low dropout voltage
makes this device ideal for battery power
applications. The high ripple rejection and low
noise of the AIC1952 provide enhanced
performances for critical applications such as
cellular phones, and PDAs.
The AIC1952 includes current limit and thermal
shutdown protection. Each of the output is
controlled independently.
TYPICAL APPLICATION CIRCUIT
VIN
1 EN1 VOUT1 6
2 VIN
GND 5
CIN
1F
3 EN2
VOUT2 4
AIC1952
VOUT1
COUT1
1F
VOUT2
COUT2
1F
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: 886-3-5772500,
FAX: 886-3-5772510 www.analog.com.tw
DS-1952G-04 20121101
1
1 page  
AIC1952
ELECTRICAL CHARACTERISTICS
(VIN = VOUT + 1V, VEN1=VEN2= VIN, TJ=25C, unless otherwise specified) (Note 1)
PARAMETER
TEST CONDITIONS SYMBOL MIN. TYP.
Input Voltage (Note 2)
Output Voltage Tolerance
Continuous Output Current
Quiescent Current
GND Pin Current
Standby Current
Output Current Limit
Dropout Voltage
Line Regulation
Load Regulation
Ripple Rejection
VIN= 6V, IOUT = 1mA
VEN2 = VEN1 = VIN
IOUT1 = 300mA & IOUT2 =
300mA, VEN2 = VEN1 = VIN
VEN1=VEN2= 0
VIN= 5V, VOUT = GND
VOUT=1.2V
IOUT = 300mA VOUT=1.8V
VOUT=2.5V
VOUT=3.3V
VIN = VOUT + 1V to 6V
IOUT = 1mA to 300mA
f=1kHz, Ripple=0.5Vp-p,
VIN
VOUT
IOUT
IQ
IGND
ISTBY
IIL
VDROP
VLIR
VLOR
PSRR
1.6
-2
300
340
50
55
500
640
380
270
200
3
2
70
Output Noise Voltage
f= 10~100KHz
24
Temperature Coefficient
TC 50
Thermal Shutdown
Temperature
VIN = VOUT + 1V
150
Thermal Shutdown
Hysteresis
35
EN Pin SPECIFICATIONS
EN Pin Current
Shutdown Exit Delay Time
VEN1 = VEN2 = VIN
IEN
t
100
Max Output Discharge
Resistance to GND during
shutdown
RDSON_
CLMP
20
EN Input Threshold
Output ON
Output OFF
VENH
VENL
1.6
MAX.
6.0
2
80
80
0.1
720
700
440
330
250
16
10
0.1
0.25
UNIT
V
%
mA
A
A
A
mA
mV
mV
mV
dB
Vrms
ppm/℃
℃
℃
A
S
Ω
V
Note 1: Specifications are production tested at TA=25C. Specifications over the -40C to 85C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
Note 2: VIN(min) is the higher value of Vout + Dropout Voltage or 1.6V.
5
5 Page 
AIC1952
APPLICATION INFORMATION
The AIC1952 is a low-dropout, low quiescent-current,
dual-output linear regulator for battery power
applications. These parts are available with preset
output voltages ranging from 0.8V to 3.8V, and the
parts can supply loads up to 300mA.
SHUTDOWN
The AIC1952 has two independent shutdown control
inputs (EN1 and EN2). By connecting EN1 pin to
ground, output1 can be shut down. By connecting
EN2 pin to ground, output2 can be shut down. By
connecting both of EN1 pin and EN2 pin to ground,
the AIC1952 can be shut down to reduce the supply
current to 0.1A.
CURRENT LIMIT
The AIC1952 includes two independent current
limiters, which monitor and control the maximum
output current. If the output is overloaded or shorted
to ground, this can protect the device from being
damaged.
THERMAL PROTECTION
The AIC1952 includes a thermal-limiting circuit, which
is designed to protect the device against overload
condition. When the junction temperature exceeds
TJ=150ºC, the thermal-limiting circuit turns off the
pass transistors and allows the IC to cool. For
continuous load condition, maximum rating of junction
temperature must not be exceeded.
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output capacitors
to maintain stability. Input capacitor at 1F with a 1F
ceramic output capacitor for each regulator is
recommended. When choosing the input and output
ceramic capacitors, X5R and X7R types are
recommended because they retain their capacitance
over wider ranges of voltage and temperature than
other types.
POWER DISSIPATION
The maximum power dissipation of AIC1952
depends on the thermal resistance of its case and
circuit board, the temperature difference between the
die junction and ambient air, and the rate of airflow.
The rate of temperature rise is greatly affected by the
mounting pad configuration on the PCB, the board
material, and the ambient temperature. When the IC
mounting with good thermal conductivity is used, the
junction temperature will be low even when large
power dissipation applies.
The power dissipation across the device is
P = IOUT1 (VIN-VOUT1)+ IOUT2 (VIN-VOUT2)
The maximum power dissipation is:
PMAX
(TJ-max - TA )
Rθ JA
Where TJ-max is the maximum allowable junction
temperature (150C), and TA is the ambient
temperature suitable in application.
As a general rule, the lower temperature is, the better
reliability of the device is. So the PCB mounting pad
should provide maximum thermal conductivity to
maintain low device temperature.
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AIC1952.PDF ] | |
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