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LTC4012-2_15 Datasheet, PDF (4/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control
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LTC4012/
LTC4012-1/LTC4012-2
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
RIN
SHDN Pull-Down Resistance
ICLPS
CLP Shutdown Current
CLP = 12V, DCIN = 0V
SHDN = 0V
40
kΩ
l
15
26
µA
350
500
µA
ILEAK-BAT BAT Leakage Current
SHDN = 0V or DCIN = 0V,
l –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 18V
ILEAK-CSN CSN Leakage Current
SHDN = 0V or DCIN = 0V,
l –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 20V
ILEAK-CSP CSP Leakage Current
SHDN = 0V or DCIN = 0V,
l –1.5
0
1.5
µA
0V ≤ CSP = CSN = BAT ≤ 20V
ILEAK-SW SW Leakage Current
SHDN = 0V or DCIN = 0V,
0V ≤ SW ≤ 20V
l –1
0
2
µA
INTVDD Regulator
INTVDD Output Voltage
ΔVDD
Load Regulation
IDD
Short-Circuit Current (Note 5)
Switching Regulator
No Load
IDD = 20mA
INTVDD = 0V
l 4.85
5
5.15
V
–0.4
–1
%
50
85
130
mA
IITH
ITH Current
fTYP
Typical Switching Frequency
fMIN
Minimum Switching Frequency
DCMAX
Maximum Duty Cycle
tR-TG
TGATE Rise Time
tF-TG
TGATE Fall Time
tR-BG
BGATE Rise Time
tF-BG
BGATE Fall Time
tNO
TGATE, BGATE Non-Overlap Time
PowerPath Control
ITH = 1.4V
CLOAD = 3.3nF
CLOAD = 3.3nF
CLOAD = 3.3nF, 10% – 90%
CLOAD = 3.3nF, 90% – 10%
CLOAD = 3.3nF, 10% – 90%
CLOAD = 3.3nF, 90% – 10%
CLOAD = 3.3nF, 10% – 10%
–40/+90
µA
467
550
633
kHz
20
25
kHz
98
99
%
60
110
ns
50
110
ns
60
110
ns
60
110
ns
110
ns
IDCIN
DCIN Input Current
0V ≤ DCIN ≤ CLP
l –10
60
µA
VFTO
Forward Turn-On Voltage (DCIN Detection Threshold) DCIN-CLP, DCIN rising
l 15
60
mV
VFR
Forward Regulation Voltage
DCIN-CLP
l 15
25
35
mV
VRTO
Reverse Turn-Off Voltage
DCIN-CLP, DCIN falling
l –45
–25
–15
mV
VOL(INFET) INFET Output Low Voltage, Relative to CLP
DCIN-CLP = 0.1V, IINFET =1µA
–6.5
–5
V
VOH(INFET) INFET Output High Voltage, Relative to CLP
DCIN-CLP = –0.1V, IINFET =–5µA
–250
250
mV
tIF(ON)
INFET Turn-On Time
To CLP-INFET > 3V, CINFET = 1nF
85
180
µs
tIF(OFF)
INFET Turn-Off Time
To CLP-INFET < 1.5V, CINFET = 1nF
2.5
6
µs
Float Voltage Select Inputs (LTC4012-1/LTC4012-2 Only)
VIL
Input Voltage Low
VIH
Input Voltage High
IIN
Input Current
Indicator Outputs
0V ≤ VIN ≤ 5V
0.5
V
3.5
V
–10
10
µA
VOL
Output Voltage Low
ILEAK
Output Leakage
IC10
CHRG C/10 Current Sink
ILOAD = 100µA, PROG = 1.2V
SHDN = 0V, DCDIV = 0V,
VOUT = 20V
CHRG = 2.5V
l –10
500
mV
10
µA
l 15
25
38
µA
4012fa

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