Data Sheet

LT3652
3
3652fe
For more information www.linear.com/LT3652
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
V
IN
Operating Range
V
IN
Start Voltage
V
BAT
= 4.2 (Notes 3, 4)
V
BAT
= 4.2 (Note 4)
l
l
4.95
7.5
32 V
V
V
IN(OVLO)
OVLO Threshold
OVLO Hysteresis
V
IN
Rising
l
32 35
1
40 V
V
V
IN(UVLO)
UVLO Threshold
UVLO Hysteresis
V
IN
Rising 4.6
0.2
4.95 V
V
V
FB(FLT)
Float Voltage Reference (Note 6)
l
3.282
3.26
3.3 3.318
3.34
V
V
ΔV
RECHARGE
Recharge Reference Threshold Voltage Relative to V
FB(FLT)
(Note 6) 82.5 mV
V
FB(PRE)
Reference Precondition Threshold V
FB
Rising (Note 6) 2.3 V
V
FB(PREHYST)
Reference Precondition Threshold
Hysteresis
Voltage Relative to V
FB(PRE)
(Note 6) 70 mV
V
IN_REG(TH)
Input Regulation Reference V
FB
= 3V; V
SENSE
– V
BAT
= 50mV
l
2.65 2.7 2.75 V
I
IN_REG
Input Regulation Reference Bias Current V
IN_REG
= V
IN_REG(TH)
l
35 100 nA
I
VIN
Operating Input Supply Current CC/CV Mode, I
SW
= 0
Standby Mode
Shutdown (SHDN = 0)
l
2.5
85
15
3.5 mA
µA
µA
I
BOOST
BOOST Supply Current Switch On, I
SW
= 0,
2.5 < V
(BOOST – SW)
< 8.5
20 mA
I
BOOST/
I
SW
BOOST Switch Drive I
SW
= 2A 30 mA/A
V
SW(ON)
Switch-On Voltage Drop V
IN
– V
SW
, I
SW
= 2A 350 mV
I
SW(MAX)
Switch Current Limit
l
2.5 3 A
V
SENSE(PRE)
Precondition Sense Voltage V
SENSE
– V
BAT
; V
FB
= 2V 15 mV
V
SENSE(DC)
Maximum Sense Voltage V
SENSE
– V
BAT
; V
FB
= 3V (Note 7)
l
95 100 105 mV
V
SENSE(C/10)
C/10 Trigger Sense Voltage V
SENSE
– V
BAT
, Falling
l
7.5 10 12.5 mV
I
BAT
BAT Input Bias Current Charging Terminated 0.1 1 µA
I
SENSE
SENSE Input Bias Current Charging Terminated 0.1 1 µA
I
REVERSE
Charger Reverse Current
I
BAT
+ I
SENSE
+ I
SW
V
IN
= 0; V
BAT
= V
SENSE
= V
SW
= 4.2V 1 µA
I
VFB
V
FB
Input Bias Current Charging Terminated 65 nA
I
VFB
V
FB
Input Bias Current CV Operation (Note 5) 110 nA
V
NTC(H)
NTC Range Limit (High) V
NTC
Rising
l
1.25 1.36 1.45 V
V
NTC(L)
NTC Range Limit (Low) V
NTC
Falling
l
0.27 0.29 0.315 V
V
NTC(HYST)
NTC Threshold Hysteresis % of threshold 20 %
R
NTC(DIS)
NTC Disable Impedance Impedance to ground
l
250 500 kΩ
I
NTC
NTC Bias Current V
NTC
= 0.8V
l
47.5 50 52.5 µA
V
SHDN
Shutdown Threshold Rising
l
1.15 1.2 1.25 V
V
SHDN(HYST)
Shutdown Hysteresis 120 mV
I
SHDN
SHDN Input Bias Current –10 nA
V
CHRG
, V
FAULT
Status Low Voltage 10mA Load
l
0.4 V
I
TIMER
Charge/Discharge Current 25 µA
V
TIMER(DIS)
Timer Disable Threshold
l
0.1 0.25 V
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 20V, Boost – SW = 4V, SHDN = 2V, V
FB
= 3.3V, C
TIMER
= 0.68µF.
ELECTRICAL CHARACTERISTICS