LTC3350_15 Datasheet, PDF (4/46 Pages) Linear Technology – High Current Supercapacitor Backup Controller and System Monitor

LTC3350
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_OUT = 12V, V_DRVCC = V_INTVCC unless otherwise
noted.
SYMBOL PARAMETER
Switching Regulator
V_IN
I_Q
V_CAPFBHI
Input Supply Voltage
Input Quiescent Current (Note 4)
Maximum Regulated V_CAP Feedback Voltage
V_CAPFBLO
I_CAPFB
V_OUTFB
Minimum Regulated V_CAP Feedback Voltage
CAPFB Input Leakage Current
Regulated V_OUT Feedback Voltage
V_OUTFB(TH)
I_OUTFB
V_OUTBST
V_UVLO
OUTFET Turn-Off Threshold
OUTFB Input Leakage Current
V_OUT Voltage in Step-Up Mode
INTV_CC Undervoltage Lockout
V_DRVUVLO DRV_CC Undervoltage Lockout
V_DUVLO
V_IN – V_CAP Differential Undervoltage Lockout
V_OVLO
V_IN Overvoltage Lockout
V_VCAPP5
Charge Pump Output Voltage
Input Current Sense Amplifier
V_SNSI
Regulated Input Current Sense Voltage
(VOUTSP – VOUTSN)
Charge Current Sense Amplifier
V_SNSC
Regulated Charge Current Sense Voltage
(ICAP – VCAP)
V_CMC
V_PEAK
V_REV
I_ICAP
Common Mode Range (ICAP, VCAP)
Peak Inductor Current Sense Voltage
Reverse Inductor Current Sense Voltage
ICAP Pin Current
Error Amplifier
g_MV
g_MC
g_MI
g_MO
Oscillator
V_CAP Voltage Loop Transconductance
Charge Current Loop Transconductance
Input Current Loop Transconductance
V_OUT Voltage Loop Transconductance
f_SW
Switching Frequency
Maximum Programmable Frequency
Minimum Programmable Frequency
CONDITIONS
V_CAPDAC Full Scale (1111b)
V_CAPDAC Zero Scale (0000b)
V_CAPFB = 1.2V
Falling Threshold
V_OUTFB = 1.2V
V_IN = 0V
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
Relative to V_CAP, 0V ≤ V_CAP ≤ 20V
V_CAP = 10V
Step-Down Mode
Step-Down Mode, V_SNSC = 32mV
Step-Up Mode, V_SNSC = 32mV
R_T = 107k
R_T = 53.6k
R_T = 267k
MIN TYP MAX UNITS
l 4.5
35
V
4
mA
1.188 1.200 1.212
V
l 1.176 1.200 1.224
V
0.628 0.638 0.647
V
l –50
50
nA
1.188 1.200 1.212
V
l 1.176 1.200 1.224
V
1.27 1.3 1.33
V
l –50
50
nA
l 4.5
35
V
l
4.3 4.45
V
l 3.85
4
V
l
4.2 4.35
V
l 3.75
3.9
V
l 145 185 225
mV
l 55
90
125
mV
l 37.7 38.6 39.5
V
l 36.3 37.2 38.1
V
5
V
31.36 32.00 32.64
mV
l 31.04 32.00 32.96
mV
31.36 32.00 32.64
mV
l 31.04 32.00 32.96
mV
0
20
V
l 51
58
65
mV
l 3.867
7
10
mV
30
µA
135
µA
1
mmho
64
μmho
64
μmho
400
μmho
495 500 505
kHz
l 490 500 510
kHz
1
MHz
200
kHz
3350fb
4
For more information www.linear.com/LTC3350