Datasheet
3
LTC4006
4006fa
The ● denotes specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at T
A
= 25°C. V
DCIN
= 20V, V
BAT
= 12V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Comparators I
CMP
and I
REV
I
TMAX
Maximum Current Sense Threshold (V
CSP
– V
BAT
)V
ITH
= 2.5V ● 140 165 200 mV
I
TREV
Reverse Current Threshold (V
CSP
– V
BAT
)–30mV
Current Sense Amplifier, CA2
Transconductance 1 mmho
Source Current Measured at I
TH
, V
ITH
= 1.4V – 40 µA
Sink Current Measured at I
TH
, V
ITH
= 1.4V 40 µA
Current Limit Amplifier
Transconductance 1.5 mmho
V
CLP
Current Limit Threshold ● 93 100 107 mV
I
CLP
CLP Input Bias Current 100 nA
Voltage Error Amplifier, EA
Transconductance 1 mmho
Sink Current Measured at I
TH
, V
ITH
= 1.4V 36 µA
OVSD Overvoltage Shutdown Threshold as a Percent ● 102 107 110 %
of Programmed Charger Voltage
Input P-Channel FET Driver (INFET)
DCIN Detection Threshold (V
DCIN
– V
CLN
) DCIN Voltage Ramping Up ● 0 0.17 0.25 V
from V
CLN
– 0.1V
Forward Regulation Voltage (V
DCIN
– V
CLN
) ● 25 50 mV
Reverse Voltage Turn-Off Voltage (V
DCIN
– V
CLN
) DCIN Voltage Ramping Down ● –60 –25 mV
INFET “On” Clamping Voltage (V
DCIN
– V
INFET
)I
INFET
= 1µA ● 5 5.8 6.5 V
INFET “Off” Clamping Voltage (V
DCIN
– V
INFET
)I
INFET
= –25µA 0.25 V
Thermistor
NTCVR Reference Voltage During Sample Time 4.5 V
High Threshold V
NTC
Rising ● NTCVR NTCVR NTCVR V
• 0.48 • 0.5 • 0.52
Low Threshold V
NTC
Falling ● NTCVR NTCVR NTCVR V
• 0.115 • 0.125 • 0.135
Thermistor Disable Current V
NTC
≤ 10V 10 µA
Indicator Outputs (ACP/SHDN, CHG)
C10TOL C/10 Indicator Accuracy Voltage Falling at PROG ● 0.375 0.400 0.425 V
LBTOL LOBAT Threshold Accuracy LTC4006-6 ● 4.70 4.93 5.14 V
LTC4006-2
● 7.27 7.5 7.71 V
LTC4006-4
● 9.70 10 10.28 V
RESTART Threshold Accuracy LTC4006-6 ● 7.5 7.8 7.96 V
LTC4006-2
● 11.35 11.7 11.94 V
LTC4006-4
● 15.15 15.6 15.92 V
V
OL
Low Logic Level of ACP/SHDN, CHG I
OL
= 100µA ● 0.5 V
V
OH
High Logic Level of ACP/SHDN I
OH
= –1µA ● 2.7 V
I
PO
Pull-Up Current on ACP/SHDN V = 0V –10 µA
IC10 C/10 Indicator Sink Current from CHG V
OH
= 3V ● 15 25 38 µA
I
OFF
Off State Leakage Current of CHG V
OH
= 3V –1 1 µA
Timer Defeat Threshold at CHG 1 V