LT1239CS Linear Technology, LT1239CS Datasheet - Page 4

• Manufacturer Part Number: LT1239CS
• Description: IC BATT BACKUP MNGMNT SYS 16SOIC
• Manufacturer: Linear Technology

Specifications of LT1239CS

• Function: Back-Up Management
• Battery Type: Lithium-Ion (Li-Ion); Nickel-Metal Hydride (NiMH)
• Voltage - Supply: 7 V ~ 30 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PARAMETER
Offset Voltage
Output Current Sourcing
Regulator 2, Low Battery Detector and Error Amplifier
Quiescent Current
LT1239
The
temperature range.
Note 1: All voltages are with respect to the ground pins of the device
(pins 2, 4, 5) unless otherwise specified.
Note 2: The shutdown pin input voltage rating is required for a low
impedance source. Internal protection devices connected to the shutdown
pin will turn on and clamp the pin to approximately 7V or – 0.6V. This
range allows the use of 5V logic devices to drive the pin directly. For high
impedance sources or logic running on supply voltages greater than 5.5V,
the maximum current driven into the shutdown pin must be limited to
5mA.
Note 3: The current monitor pin for regulator 1 (pin 15) can be pulled 30V
below the input pin (pin 14). The current monitor pin must not be pulled
above the input pin.
Note 4: The current monitor pin for regulator 2 (pin 11) can be pulled 30V
below the input pin (pin 10). The current monitor pin must not be pulled
above the input pin.
Note 5: E/A (OUT) pin should not be pulled below ground or above
the voltage at Input 2.
Note 6: The device is specified to an operating temperature range of 0 C to
70 C. The device is guaranteed to be functional up to the thermal
shutdown temperature. The thermal shutdown temperature for this device
is approximately 100 C.
TYPICAL PERFORMANCE CHARACTERISTICS
4
ELECTRICAL CHARACTERISTICS
5.60
5.50
5.40
5.30
5.20
5.10
5.00
4.90
–50
denotes specifications which apply over the full operating
Low-Battery Detector Thresholds
vs Temperature
START-UP THRESHOLD
–25
SHUTDOWN THRESHOLD
Sinking
TEMPERATURE ( C)
0
25
50
W
LT1239 • TPC01
75
U
100
CONDITIONS
V
V
V
V
V
IN2
IN2
IN2
IN2
IN2
4.975
4.950
4.925
4.900
4.875
4.850
4.825
4.800
4.775
4.750
4.725
= 6.8V, V
= 6.8V, V
= 6.8V, 5V
= 6.8V, 5V
= 4.8V, 5V
–50
Regulator 2 Output Voltage vs
Temperature
–25
E/A(IN)
E/A(IN)
IN
IN
IN
= 0V, V
= 0V, V
= 0V, V
TEMPERATURE ( C)
= 3.4V, T
= 3.4V, T
0
E/A(IN)
E/A(IN)
E/A(IN)
Note 7: Operating conditions are limited by maximum junction
temperature. The regulated output specification will not apply for all
possible combinations of input voltage and output current. When
operating at maximum output current, the input voltage range must be
limited. When operating at maximum input voltage, the output current
range must be limited.
Note 8: Regulator 1 of the LT1239 is tested and specified with the adjust
pin (pin 1) tied to the output pin (pin 16). See Applications Information.
Note 9: Dropout voltage is the minimum input/output voltage required to
maintain regulation at the specified output current. In dropout, the output
voltage measured at the package pins will be equal to (V
Note 10: The quiescent current of the comparator is included in the
ground pin current and quiescent current specifications for regulator 1.
The comparator output is turned off (pin 13 = 0V, pin 12 = 5V) during
these tests.
Note 11: Ground pin current for regulator 1 is tested with V
(nominal) and a current source load. This means that the device is tested
in it’s dropout region. Ground pin current will decrease slightly at higher
input voltages.
Note 12: Adjust pin current flows into the adjust pin.
Note 13: Shutdown pin current at V
the shutdown pin.
Note 14: 6.8V is the nominal voltage of two lithium-ion cells.
25
J
J
= 25 C
= 25 C
= 3.4V
= 3.4V, V
= 2.4V
50
LT1239 • TPC02
75
PIN6
= 0V
100
3.80
3.79
3.78
3.77
3.76
3.75
3.74
3.73
3.72
3.71
3.70
–50
Regulator 1 Adjust Pin Voltage vs
Temperature
MIN
SHDN
3
3
–25
= 0V flows out of
TYP
TEMPERATURE ( C)
20
0
5
5
8
3
0
25
IN
MAX
15
30
12
6
– V
IN
50
= V
DROPOUT
OUT
LT1239 • TPC03
75
UNITS
mV
mA
mA
).
A
A
A
100