Linear Technology LTC4000, Техническое описание, Страница: 3 / 40

LTC4000
3
4000fb
For more information www.linear.com/LTC4000
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
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 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
IL
Pull-Up Current for the Input Current Limit
Programming Pin
l
–55 –50 –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 kΩ
Charge Current Monitor Resistance to GND 40 90 140 kΩ
A4, A5 Error Amp Offset for the Current Loops
(See Figure 1)
V
CL
= 0.8V, V
IL
= 0.8V
l
–10 0 10 mV
Maximum Programmable Current Limit
Voltage Range
l
0.985 1.0 1.015 V