LTC4012CUF-2#TRPBF Linear Technology, LTC4012CUF-2#TRPBF Datasheet - Page 7

• Manufacturer Part Number: LTC4012CUF-2#TRPBF
• Description: IC BATT CHRGR MC HI-EFF 20-QFN
• Manufacturer: Linear Technology

Specifications of LTC4012CUF-2#TRPBF

• Function: Charge Management
• Battery Type: Multi-Chemistry
• Voltage - Supply: 6 V ~ 28 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-WFQFN Exposed Pad
• Operating Supply Voltage (min): 6V
• Operating Supply Voltage (max): 28V
• Operating Temp Range: 0C to 85C
• Mounting: Surface Mount
• Pin Count: 20
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

typical perForMance characteristics
(T
2A/DIV
1V/DIV
1V/DIV
5V/DIV
PROG
SHDN
A
–0.5
I
–0.1
–0.2
–0.3
–0.4
CHG
ITH
600
500
100
400
300
200
0.1
= 25°C unless otherwise noted. L = IHLP-2525 6.8µH)
0.5
0.4
0.3
0.2
0
0
Charge Current Line Regulation
5
PWM Soft-Start
PWM Frequency
vs Charge Current
0
BAT = 6V
R
R
CLP = 15V
R
R
SENSE
IN
SENSE
IN
= 3.01k
= 3.01k
0.5
I
I
= 33m
CHG
CHG
= 33m
10
DCIN PIN VOLTAGE (V)
CHARGE CURRENT (A)
I
CHG
= 2A
= 3A
1.0
TIME (500µs/DIV)
= 1A
1.5
15
BAT = 14.5V
BAT = 12V
BAT = 5V
2.0
20
2.5
4012 G08
4012 G11
4012 G14
25
3.0
–0.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
25
20
15
10
0
5
0
11.0
Charge Current Load Regulation
Gate Drive Non-Overlap
Battery Shutdown Current
0
DCIN = 20V
R
R
SENSE
IN
DC1256-CLASS
APPLICATION
DCIN = 0V
= 3.01k
I
I
I
11.4
CHG
CHG
CHG
= 33m
5
BATTERY VOLTAGE (V)
= 3A
= 2A
= 1A
BATTERY VOLTAGE (V)
TIME (80ns/DIV)
11.8
10
BGATE
TGATE
LTC4012,
ALL PINS
DCIN = 0V
12.2
15
LTC4012,
BAT PINS
DCIN = 20V
12.6
20
4012 G12
4012 G15
4012 G09
LTC4012-1/LTC4012-2
13.0
25
V
GS =
–0.5
–1.0
600
500
400
300
200
100
2.5
2.0
1.0
0.5
3.0
1.5
0V
0A
0
0
Input Current Limit
0
PWM Frequency vs Duty Cycle
INFET Response Time to
DCIN Short to Ground
0
DCIN = 15V
INFET = Si7423DN
I
V
C
OUT
2.5A BULK CHARGE
2.1A INPUT CURRENT LIMIT
OUT
OUT
PFET V
= <50mA
= 12.3V
= 0.27F
0.5
20
GS
(1V/DIV)
SYSTEM LOAD (A)
DUTY CYCLE (%)
TIME (1µs/DIV)
1.0
40
LTC4012/
ICL STATE
I
CHG
I
IN
I
(5A/DIV)
1.5
60
DCIN,
CLP = 6V
CLP = 12V
CLP = 20V
CLP = 25V
I
CHG
REVERSE
2.0
80
= 750mA
4012 G16
4012 G13
4012 G10
4012fa

100
2.5