Datasheet

LTC4020
7
4020fd
For more information www.linear.com/LTC4020
Typical perForMance characTerisTics
Ideal Diode V
F
vs Battery Voltage
Ideal Diode V
F
vs Temperature
I
INTVCC
(mA)
0
V
INTVCC
(V)
4.5
4.4
4.2
4.1
4.3
4.0
10 30 40
4020 G12
5020
25°C
125°C
PV
IN
= 4.5V
V
(CSP-CSN)
(mV)
0
V
CSOUT
(V)
1.3
1.2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
1.1
0.2
10 30 40
4020 G13
5020
BST Refresh Regulator Dropout
INTV
CC
vs I
INTVCC
CSOUT vs CSP-CSN
Switching Frequency vs Input
Voltage
Switching Frequency vs
Temperature
I
RNG/SS
, I
LIMIT
, I
NTC
, vs
Temperature
Feedback References vs Input
Voltage INTV
CC
vs V
IN
V
IN
(V)
5
FEEDBACK REFERENCES (V)
2.80
2.75
2.65
2.60
2.55
2.50
2.45
2.40
2.35
2.30
2.70
2.25
1510 3530 4540 50
4020 G14
552520
VFBMAX
VFLOAT(CC/CV;ABSORB)
VFLOAT(LEAD-ACID)
V
IN
(V)
5
V
INTVCC
(V)
5.10
5.08
5.04
5.02
5.00
4.98
4.96
4.94
4.92
5.06
4.90
1510 3530 4540 50
4020 G15
552520
I
INTVCC
= 5mA
TEMPERATURE (°C)
–40
I
RNG/SS
, I
LIMIT
, I
NTC
(µA)
52.5
52.0
51.0
50.5
50.0
49.5
49.0
48.5
48.0
51.5
47.5
–25 5 20 35 50 65 80 11095
4020 G18
125–10
V
BAT
(V)
0
IDEAL DIODE V
F
(mV)
16.0
15.5
15.0
13.5
13.0
12.5
14.5
14.0
12.0
10 25 30 35 40 45 50
4020 G10
555 15 20
TEMPERATURE (°C)
–40
IDEAL DIODE V
F
(mV)
24
22
20
16
14
12
18
10
–10 35 50 65 80 95 110
4020 G11
125–25 5 20
V
BAT
= 20V
T
A
= 25°C, unless otherwise noted.
V
IN
(V)
0
SWITCHING FREQUENCY (kHz)
255
254
252
251
250
249
248
247
246
253
245
10 30 40 50
4020 G16
6020
R
RT
= 100kΩ
TEMPERATURE (°C)
–40
SWITCHING FREQUENCY (kHz)
255
254
252
251
250
249
248
247
246
253
245
–25 5 20 35 50 65 80 11095
4020 G17
125–10
V
IN
= 20V
R
RT
= 100kΩ
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