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LM3620 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM3620
Description  Lithium-Ion Battery Charger Controller
PDF  6 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3620 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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LM3620-8
V
DRIVE = 5V, IDRIVE = 2mA. Limits with boldface type apply over the full operating ambient temperature range, 0˚C to + 70˚C,
limits with standard typeface apply for T
A = 25˚C.
Symbol
Parameter
Conditions
Typical
Limit
Units
V
REG
Regulated Output Voltage (pin
1 to ground)
Pin 5 shorted to pin 1 (graphite
anode)
8.2
8.102/8.036
V(min)
8.298/8.364
V(max)
Pin 5 open (coke anode)
8.4
8.299/8.232
V(min)
8.501/8.568
V(max)
Regulated Output Voltage
Tolerance
Either Pin 5 setting
±1.2/±2.0
%
V
REG/VDRIVE
Supply Sensitivity
V
REG for 5V ≤ VDRIVE ≤ 30V
200
µV/V(max)
I
Q
Quiescent Current
V
REG = 8.7V, VEXT = 1.0V (Note 4)
400
750
µA(max)
I
OFF
Off State Current
V
DRIVE open circuited (Note 5)
10
200
nA(max)
I
DRIVE
Drive Pin Sink Current
V
DRIVE = 5.0V
20
15
mA(min)
Gm
(DRIVE)
Drive Pin Transconductance
∆I
DRIVE/∆VREG
2mA
≤ I
DRIVE ≤15mA
1.5
A/V
I
EXT
External Pin Source Current
V
EXT = 1V (Note 6)
3
2.5
mA(min)
Gm
(EXT)
External Pin Transconductance
∆I
EXT/∆VREG,VEXT = 1V
0mA
≤ I
EXT ≤ 2.5mA
0.4
A/V
R
IN
V
REG Input Resistance
Pin 1 to Ground.
Circuit biased with V
DRIVE applied
V
DRIVE open circuited
110
k
Ω
42
M
Ω
R
F
Feedback Resistance
Pin 1 to Pin 5
2900
Ω
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is limited by TJMAX (maximum junction temperature), θJ-A
(junction-to-ambient thermal resistance) and TA (ambient temperature). The maximum power dissipation at any temperature is: PDissMAX = (TJMAX −TA)/θJ-A up to
the value listed in the Absolute Maximum Ratings.
Note 3: Rating is for the human body model, a 100 pF capacitor discharged through a 1.5k
Ω resistor into each pin.
Note 4: Quiescent current is all current flowing to ground when the voltage at the VREG pin is forced to be above the nominal regulating voltage (VREG).
Note 5: Off current is all of the current flowing to ground including all leakage current that would be drawn from the battery connected to the VREG terminal.
Note 6: When the External pin is being used as the driving source, it is recommended to keep the operating point of VEXT ≤ 1V. If greater than 1V, the internal circuitry
would bias IDRIVE to conduct up to the current limit level continuously causing unnecessary power dissipation in the device.
www.national.com
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