LT1239 Просмотр технического описания (PDF) - Linear Technology
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LT1239 Datasheet PDF : 12 Pages
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LT1239
DESCRIPTION
ing circuitry. A low-battery detector with a 5V threshold
powers down the second regulator and the error amplifier
to limit the discharge voltage of the backup cells. This
prevents deep discharge damage to the lithium cells. Both
regulators have independent shutdown and current moni-
tor functions.
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input 1 Voltage ...................................................... ±30V
Input 2 Voltage ............................................. 30V, – 0.6V
Output 1 Voltage ........................................... 30V, – 0.6V
Output 2 Voltage ............................................. 6V, – 0.6V
Adjust Pin Current ................................................ 10mA
SHDN1, SHDN2 (Note 2)
Input Voltage .............................................. 6V, – 0.6V
Input Current ...................................................... 5mA
IMON1 Voltage
(Note 3) .......................... (VIN1 – 30V) < IMON1 < VIN1
IMON2 Voltage
(Note 4) .......................... (VIN2 – 30V) < IMON2 < VIN2
E/A Output Voltage (Note 5) .... – 0.6V < VE/A(OUT) < VIN2
E/A Input Voltage (Note 5) .......... – 0.6V < VE/A(IN) < VIN2
5V Input Voltage ............................................. 6V, – 0.6V
Operating Temperature Range ......................... 0 to 70°C
Junction Temperature Range .............................(Note 6)
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
ADJ 1
GND 2
SHDN1 3
GND 4
GND 5
SHDN2 6
E/A (IN) 7
E/A (OUT) 8
TOP VIEW
16 OUT 1
15 IMON1
14 INPUT 1
13 5VIN
12 OUT 2
11 IMON2
10 INPUT 2
9 NC
S PACKAGE
16-LEAD PLASTIC SO
TJMAX = 100°C, θJA = 120°C/ W
ORDER PART
NUMBER
LT1239CS
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
PARAMETER
Regulator 1 (Notes 7, 8)
Regulated Output Voltage (VADJ = VOUT1)
Line Regulation
Load Regulation
Dropout Voltage (Note 9)
Ground Pin Current (Notes 10, 11)
Adjust Pin Bias Current (Note 12)
CONDITIONS
VIN1 = 4.3V, IOUT = 1mA, TJ = 25°C
VIN1 = 4.8V to 24V, IOUT = 1mA to 30mA
ILOAD = 1mA, VIN1 = 4.3V to 30V
VIN1 = 5V, ILOAD = 1mA to 30mA, TJ = 25°C
VIN1 = 5V, ILOAD = 1mA to 30mA
VIN1 = 5V, ILOAD = 1mA to 50mA, TJ = 25°C
VIN1 = 5V, ILOAD = 1mA to 50mA
ILOAD = 1mA, TJ = 25°C
ILOAD = 30mA, TJ = 25°C
ILOAD = 50mA, TJ = 25°C
ILOAD = 0mA, VIN1 = 3.75V
ILOAD = 30mA, VIN1 = 3.75V
ILOAD = 50mA, VIN1 = 3.75V
TJ = 25°C
MIN TYP MAX UNITS
3.700 3.750 3.800
V
q 3.650 3.750 3.825
V
q
2
10
mV
– 12 – 25
mV
q
– 20 – 50
mV
– 20
mV
– 30
mV
0.15 0.20
V
0.25 0.40
V
0.30
V
q
20
30
µA
q
0.80 1.2
mA
1.35
mA
40
120
nA
2
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