LTC4012CUF-2#TRPBF Linear Technology, LTC4012CUF-2#TRPBF Datasheet - Page 6

• 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

LTC4012/
LTC4012-1/LTC4012-2
typical perForMance characteristics
(T

A
300
275
250
225
200
175
125
150
100
= 25°C unless otherwise noted. L = IHLP-2525 6.8µH)
75
0
FBDIV Pin R
5
100
100
BATTERY VOLTAGE (V)
95
90
85
80
95
90
85
80
Efficiency at DCIN = 20V, BAT = 8V
0
Efficiency at DCIN = 20V, BAT = 16V
0
ON
10
R
R
SENSE
IN
vs Battery Voltage
= 3.01k
0.5
EFFICIENCY
0.5
= 33m
EFFICIENCY
15
CHARGE CURRENT (A)
CHARGE CURRENT (A)
CLP = BAT + 3V
(CLP ≥ 6V)
1
1
POWER LOSS
20
1.5
1.5
POWER LOSS
4012 G05
25
R
R
2
2
SENSE
IN
= 3.01k
2.5
= 33m
2.5
STATE
LOAD
4012 G01
4012 G03
3
3
Battery Load Dump
12.1V
CLP = 20V
V
10000
1000
100
10000
1000
100
OUT
= 12.3V
DISCONNECT
2A
1A
TIME (1ms/DIV)
3A
1A
RECONNECT
–0.02
–0.04
–0.06
–0.08
–0.10
0.10
0.08
0.06
0.04
0.02
100
95
90
85
80
0
5
Efficiency at DCIN = 20V, BAT = 12V
0
V
LTC4012 TEST CIRCUIT
FB
4012 G06
R
R
SENSE
IN
Line Regulation
= 3.01k
0.5
10
= 33m
CHARGE CURRENT (A)
CLP PIN VOLTAGE (V)
1
15
–1
–2
–3
–4
–5
–6
1.5
2
1
0
0
Charge Current Accuracy
EFFICIENCY
POWER LOSS
20
2
2
4
25
6
BATTERY VOLTAGE (V)
2.5
8
DCIN = 12V
R
4012 G02
4012 G04
PROG
10
30
3
12
= 26.7k
10000
1000
100
14
R
R
16 18
DCIN = 24V
R
SENSE
IN
PROG
= 3.01k
20
= 35.7k
= 33m
4012 G07
22
4012fa
24