Datasheet

LTC4090/LTC4090-5
6
4090fc
SWITCH CURRENT (mA)
0
400
500
700
1500
4090 G12
300
200
500 1000 2000 2500
100
0
600
VOLTAGE DROP (mV)
0
3000
4000
5000
80
4090 G07
2000
1000
2500
3500
4500
1500
500
0
20
40
60
100
V
FWD
(mV)
I
OUT
(mA)
V
BAT
= 3.7V
V
IN
= 0V
Si2333 PFET
–50°C
0°C
50°C
100°C
V
BAT
(V)
0
0
I
BAT
(mA)
100
300
400
500
1
2
2.5 4.5
4090 G04
200
0.5 1.5
3
3.5
4
600
V
IN
= 5V
V
OUT
= NO LOAD
R
PROG
= 100k
R
CLPROG
= 2k
HPWR = 5V
HPWR = 0V
TEMPERATURE (°C)
–50
I
BAT
(mA)
400
500
600
25 75
4090 G05
300
200
–25 0
50 100 125
100
0
R
PROG
= 2.1k
V
IN
= 5V
V
BAT
= 3.5V
Q
JA
= 40°C/W
V
FWD
(mV)
0
0
I
OUT
(mA)
100
300
400
500
1000
700
50
100
4090 G06
200
800
900
600
150
200
V
BAT
= 3.7V
V
IN
= 0V
–50°C
0°C
50°C
100°C
I
OUT
(A)
0
EFFICIENCY (%)
80
90
100
0.8
4090 G08
70
60
75
85
95
65
55
50
0.2
0.4
0.6
1.0
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
FIGURE 12 SCHEMATIC
V
BAT
= 4.21V (I
BAT
= 0)
HVIN (V)
5
1.8
I
OUT
(A)
2.0
2.2
2.4
2.6
3.0
10
15 20 25
4090 G10
30 35
2.8
FIGURE 12 SCHEMATIC
V
BAT
= 4.21V (I
BAT
= 0)
TYPICAL
MINIMUM
TEMPERATURE (˚C)
MINIMUM SWITCH ON TIME (ns)
80
100
120
4090 G11
60
40
20
0
140
–50 25–25 0 50 75 100 15
0
125
TYPICAL PERFORMANCE CHARACTERISTICS
Charging from USB, I
BAT
vs V
BAT
Charge Current vs Temperature
(Thermal Regulation)
Ideal Diode Current vs Forward
Voltage and Temperature
(No External Device)
Ideal Diode Current vs Forward
Voltage and Temperature with
External Device
LTC4090 High Voltage Regulator
Effi ciency vs Output Load
High Voltage Regulator Maximum
Load Current
High Voltage Regulator Minimum
Switch On-Time vs Temperature
High Voltage Regulator Switch
Voltage Drop
I
OUT
(A)
0
EFFICIENCY (%)
80
90
100
0.8
4090 G09
70
60
75
85
95
65
55
50
0.2
0.4
0.6
1.0
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
FIGURE 12 SCHEMATIC
V
BAT
= 4.21V (I
BAT
= 0)
LTC4090-5 High Voltage Regulator
Effi ciency vs Output Load