LTC4120_15 Datasheet, PDF (3/32 Pages) Linear Technology – Wireless Power Receiver and 400mA Buck Battery Charger

LTC4120/LTC4120-4.2
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = V_RUN = 15V, V_CHGSNS = V_BAT = 4V, R_PROG = 3.01k,
V_FB = 2.29V (LTC4120), V_BATSNS = 4V (LTC4120-4.2). Current into a pin is positive out of the pin is negative.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Operating Input Supply Range
l 12.5
40
V
Battery Voltage Range
0
11
V
I_IN
DC Supply Current
Switching, FREQ = GND
Standby Mode (Note 3)
3.5
mA
l
130 220
µA
Sleep Mode (Note 3)
LTC4120: V_FB = 2.51V (Note 5),
LTC4120-4.2: V_BATSNS = 4.4V
Disabled Mode (Note 3)
l
60 100
µA
l
37 70
µA
Shutdown Mode (Note 3)
l
20 40
µA
∆V_DUVLO Differential Undervoltage Lockout
Hysteresis
UV_INTVCC INTV_CC Undervoltage Lockout
Hysteresis
INTV_CC Regulated Voltage
INTV_CC Load Regulation
Battery Charger
V_IN-V_BAT Falling, V_IN = 5V (LTC4120),
V_IN-V_BATSNS Falling, V_IN = 5V (LTC4120-4.2)
l 20 80 160
mV
V_IN-V_BAT Rising, V_IN = 5V (LTC4120),
V_IN-V_BATSNS Rising, V_IN = 5V (LTC4120-4.2)
115
mV
INTV_CC Rising, V_IN = INTV_CC + 100mV, V_BAT = NC l 4.00 4.15 4.26
V
INTV_CC Falling
220
mV
l 4.14 4.24 4.29
V
I_INTVCC = 0mA to –5mA (Note 4)
1.7
%
I_BAT
BAT Standby Current
Standby Mode (LTC4120) (Notes 3, 7, 8)
l
Standby Mode (LTC4120-4.2) (Notes 3, 7, 8)
l
2.5 4.5
µA
50 1000
nA
BAT Shutdown Current
Shutdown Mode (LTC4120) (Notes 3, 7, 8)
l
Shutdown Mode (LTC4120-4.2) (Notes 3, 7, 8)
l
1100 2000
nA
10 1000
nA
I_BATSNS
BATSNS Standby Current (LTC4120-4.2)
BATSNS Shutdown Current (LTC4120-4.2)
Standby Mode (Notes 3, 7, 8)
Shutdown Mode (Notes 3, 7, 8)
l
5.4 10
µA
l
1100 2000
nA
I_FB
I_FBG(LEAK)
R_FBG
V_FB(REG)
Feedback Pin Bias Current (LTC4120)
V_FB = 2.5V (Notes 5, 7)
Feedback Ground Leakage Current (LTC4120) Shutdown Mode (Notes 3, 7)
Feedback Ground Return Resistance (LTC4120)
Feedback Regulation Voltage (LTC4120)
(Note 5)
l
25 60
nA
l
1
µA
l
1000 2000
Ω
2.393 2.400 2.407
V
l 2.370
2.418
V
V_FLOAT
Regulated Float Voltage (LTC4120-4.2)
4.188 4.200 4.212
V
l 4.148
4.227
V
I_CHG
Battery Charge Current
V_UVCL
V_RCHG
V_{RCHG_4.2}
h_PROG
Undervoltage Current Limit
Battery Recharge Threshold
Battery Recharge Threshold
Ratio of BAT Current to PROG Current
V_PROG
R_SNS
PROG Pin Servo Voltage
CHGSNS-BAT Sense Resistor
R_PROG = 3.01k
R_PROG = 24.3k
V_IN Falling
V_FB Falling Relative to V_{FB_REG} (LTC4120) (Note 5)
V_BATSNS Falling Relative to V_FLOAT (LTC4120-4.2)
V_TRKL < V_FB < V_FB(REG) (LTC4120) (Note 5)
V_{TRKL_4.2} < V_BATSNS < V_FLOAT (LTC4120-4.2)
I_BAT = –100mA
l 383
l 45
l –38
l –70
402 421
50 55
12.0
–50 –62
–92 –114
988
l 1.206 1.227 1.248
300
mA
mA
V
mV
mV
mA/mA
V
mΩ
For more information www.linear.com/LTC4120
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