LTC4090(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC4090 Datasheet PDF : 28 Pages
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LTC4090/LTC4090-5
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. HVIN = HVEN = 12V, BOOST = 17V, VIN = HPWR = 5V, VBAT = 3.7V,
RPROG = 100k, RCLPROG = 2k and SUSP = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
VCLEN
Input Current Limit Enable Threshold
Voltage (VIN - VOUT)
VUVLO
Input Undervoltage Lockout
ΔVUVLO
Input Undervoltage Lockout Hysteresis
High Voltage Regulator
(VIN - VOUT) Rising
(VIN - VOUT) Falling
VIN Rising
VIN Rising – VIN Falling
20
50
–80
–50
● 3.6
3.8
130
80
mV
–20
mV
4
V
mV
VHVIN
VOVLO
IHVIN
HVIN Supply Voltage
HVIN Overvoltage Lockout Threshold
HVIN Bias Current
Shutdown; HVEN = 0.2V
Not Switching, HVOUT = 3.6V
●6
60
V
● 36
41.5
45
V
0.01
0.5
μA
●
130
200
μA
VOUT
Output Voltage with HVIN Present
Assumes HVOUT to OUT Connection,
0 ≤ VBAT ≤ 4.2V (LTC4090)
VOUT
Output Voltage with HVIN Present
Assumes HVOUT to OUT Connection
(LTC4090-5)
3.45
VBAT + 0.3
4.6
V
4.85
5
5.15
V
fSW
Switching Frequency
tOFF
Minimum Switch Off-Time
ISW(MAX) Switch Current Limit
VSAT
Switch VCESAT
IR
Boost Schottky Reverse Leakage
VB(MIN)
Minimum Boost Voltage (Note 8)
IBST
BOOST Pin Current
Battery Management
RT = 8.66k
RT = 29.4k
RT = 187k
Duty Cycle = 5%
ISW = 2A
SW = 10V, HVOUT = 0V
ISW = 1A
2.1
2.4
0.9
1.0
160
200
●
60
3.0
3.5
500
0.02
●
1.5
22
2.7
MHz
1.15
MHz
240
kHz
150
ns
4.0
A
mV
2
μA
2.1
V
35
mA
IBAT
VFLOAT
ICHG
ICHG(MAX)
VPROG
kEOC
Battery Drain Current
VBAT Regulated Output Voltage
Constant-Current Mode Charge Current,
No Load
Maximum Charge Current
VBAT = 4.3V, Charging Stopped
Suspend Mode, SUSP = 5V
VIN = 0V, BAT Powers OUT, No Load
IBAT = 2mA
IBAT = 2mA; 0 ≤ TA ≤ 85°C
RPROG = 100k
RPROG = 50k, 0 ≤ TA ≤ 85°C
PROG Pin Servo Voltage
Ratio of End-of-Charge Indication
Current to Charge Current
RPROG = 100k
RPROG = 50k
VBAT = VFLOAT (4.2V)
●
●
●
4.165
4.158
● 465
900
● 0.98
● 0.98
● 0.085
15
22
60
4.200
4.200
500
1000
1.5
1.00
1.00
0.1
27
35
100
4.235
4.242
535
1080
1.02
1.02
0.11
μA
μA
μA
V
V
mA
mA
A
V
V
mA/mA
ITRKL
VTRKL
VCEN
Trickle Charge Current
Trickle Charge Threshold Voltage
Charge Enable Threshold Voltage
ΔVRECHRG Recharge Battery Threshold Voltage
BAT = 2V
BAT Rising
(VOUT – VBAT) Falling; VBAT = 4V
(VOUT – VBAT) Rising; VBAT = 4V
Threshold Voltage Relative to VFLOAT
35
50
● 2.75
2.9
55
80
● –65
–100
60
mA
3.0
V
mV
mV
–135
mV
4090fa
3
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