Datasheet

LTC4000-1
3
40001fa
For more information www.linear.com/LTC4001-1
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= V
CLN
= 3V to 60V unless otherwise noted (Notes 2, 3).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Supply Operating Range
l
3 60 V
I
IN
Input Quiescent Operating Current 0.4 mA
I
BAT
Battery Pin Operating Current V
IN
≥ 3V, V
CSN
= V
CSP
≥ V
BAT
l
50 100 µA
Battery Only Quiescent Current V
IN
= 0V, V
CSN
= V
CSP
≤ V
BAT
l
10 20 μA
Shutdown
ENC Input Voltage Low
l
0.4 V
ENC Input Voltage High
l
1.5 V
ENC Pull-Up Current V
ENC
= 0V –4 –2 –0.5 µA
ENC Open Circuit Voltage V
ENC
= Open
l
1.5 2.5 V
Voltage Regulation
V
IFB_REG
Input Feedback Voltage
l
0.985 1.000 1.010 V
IFB Input Current V
IFB
= 1.0V ± 0.1 µA
V
BFB_REG
Battery Feedback Voltage
l
1.133
1.120
1.136
1.136
1.139
1.147
V
V
BFB Input Current V
BFB
= 1.2V ± 0.1 µA
V
OFB_REG
Output Feedback Voltage
l
1.176 1.193 1.204 V
OFB Input Current V
OFB
= 1.2V ± 0.1 µA
R
FBG
Ground Return Feedback Resistance
l
100 400 Ω
V
RECHRG(RISE)
Rising Recharge Battery Threshold Voltage % of V
BFB_REG
l
96.9 97.6 98.3 %
V
RECHRG(HYS)
Recharge Battery Threshold Voltage Hysteresis % of V
BFB_REG
0.5 %
V
OUT(INST_ON)
Instant-On Battery Voltage Threshold % of V
BFB_REG
l
82 86 90 %
V
LOBAT
Falling Low Battery Threshold Voltage % of V
BFB_REG
l
65 68 71 %
V
LOBAT(HYS)
Low Battery Threshold Voltage Hysteresis % of V
BFB_REG
3 %
Current Monitoring and Regulation
Ratio of Monitored-Current Voltage to Sense
Voltage
V
IN,CLN
≤ 50mV, V
IIMON
/V
IN,CLN
V
CSP,CSN
≤ 50mV, V
IBMON
/V
CSP,CSN
l
18.5 20 21 V/V
V
OS
Sense Voltage Offset V
CSP,CSN
≤ 50mV, V
CSP
= 60V or
V
IN,CLN
≤ 50mV, V
IN
= 60V (Note 4)
–300
300
µV
CLN, CSP, CSN Common Mode Range (Note 4)
l
3 60 V
CLN Pin Current ±1 µA
CSP Pin Current V
IGATE
= Open, V
IID
= 0V 90 μA
CSN Pin Current V
BGATE
= Open, V
BAT
= 0V 45 μA
I
CL
Pull-Up Current for the Charge Current Limit
Programming Pin
l
–55 –50 –45 μA
I
CL_TRKL
Pull-Up Current for the Charge Current Limit
Programming Pin in Trickle Charge Mode
V
BFB
< V
LOBAT
l
–5.5 –5.0 –4.5 μA
Input Current Monitor Resistance to GND 40 90 140
Charge Current Monitor Resistance to GND 40 90 140
A5 Error Amp Offset for the Charge Current
Loop (See Figure 1)
V
CL
= 0.8V
l
–10 0 10 mV
Maximum Programmable Current Limit
Voltage Range
l
0.985 1.0 1.015 V