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LP78084 Datasheet(PDF) 6 Page - Lowpower Semiconductor inc

Part # LP78084
Description  Total Power solution of Portable Applications 800mA Charge 800mA Buck DC/DC300mA LDO
PDF  20 Pages
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Manufacturer  POWER [Lowpower Semiconductor inc]
Direct Link  http://www.lowpowersemi.com
Logo POWER - Lowpower Semiconductor inc

LP78084 Datasheet(HTML) 6 Page - Lowpower Semiconductor inc

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Preliminary Datasheet
LP78084
LP78084 – 02 Ver. 1.1 Datasheet
Nov.-2007
Page 6 of 22
Electrical Characteristics (VINA
=VOUT(NOM) + 1V for VOUT options greater than 1 .5V. IOUT = 1mA, COUT = 2.2µF, CIN =
1µF, TA = -40℃ to 85℃ , unless otherwise noted. Typical values are TA=25℃ )
Voltage Regulation
VBAT_EOC
End of Charge Accuracy
4.158
4.200
4.242
V
∆ VBAT_EOC/
V
BAT_EOC
Output Charge Voltage Tolerance
1
%
VMIN
Preconditioning Voltage Threshold
2.80
2.95
3.10
V
VRCH
Battery Recharge Voltage
Threshold
Measured from VBAT _EOC
-0.15
V
∆VUVCL1
(ADP -
V
BAT)
Undervoltage
Current Limit Threshold Voltage
IBAT = 0.9 ICH
180
300
mV
∆VUVCL2
I
BAT
= 0.1 ICH
90
130
mV
Current Regulation
ICHG
Charge Current Programmable
Range
15
500
mA
∆
I
CHG
/
I
CHG
Charge Current Regulation
Tolerance
10
%
VISET
ISET Pin Voltage
1
V
K
I_A
Current Set Factor: ICHG/IISET
400
Termination Timer
3
4.5
6
hrs
Recharge Time
1.5
2.25
3
hrs
tTIMER
Low-Battery Charge Time
VBAT = 2.5V
0.75
1.125
1.5
hrs
F
BADBAT
Defective Battery Detection STAT
Pulse Frequency
2
Hz
D
BADBAT
Defective Battery Detection STAT
Pulse Frequency Duty Ratio
75
%
TLIM
Junction Temperature in Constant-
Temperature Mode
115
℃
Charging Devices
RDS(ON)
Charging Transistor On Resistance VADP = 4.2V
1
Logic Control / Protection
VEN(H)
Enable Threshold High
1.6
V
V
EN(L)
Enable Threshold Low
0.4
V
VSTAT
Output Low Voltage
STAT Pin Sinks 4mA
0.4
V
I
STAT
STAT Pin Current Sink Capability
8
mA
ITK/ICHG
Pre-Charge Current
ICHG = 1 00mA
10
%
I
TERM
/
I
CHG
Charge Termination Threshold
Current
10
%



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