LTC3388-1_15 Datasheet, PDF (3/20 Pages) Linear Technology – 20V High Efficiency Nanopower Step-Down Regulator

LTC3388-1/LTC3388-3
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are for T_A = 25°C (Note 2). Unless otherwise noted, V_IN = 5.5V.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX
UNITS
V_IN
Input Voltage Range
l 2.7
20
V
I_Q
V_IN Quiescent Current When Enabled
UVLO
V_IN = 2V
Sleep
V_IN = 4V
Sleep
V_IN = 20V
Active
I_SW = 0A (Note 4)
400
600
nA
720 1100
nA
820 1200
nA
150
250
μA
I_Q,STBY
V_IN Quiescent Current Enabled, in Standby
Sleeping
V_IN = 4V
Not Sleeping
V_IN = 4V
720 1100
nA
2000 3000
nA
I_Q,SD
V_IN Quiescent Current When Disabled
V_IN = 4V
V_IN = 20V
520
800
nA
620
900
nA
V_UVLO
V_IN Undervoltage Lockout Threshold
V_IN Rising
V_IN Falling
l
2.5
2.65
V
l 2.15
2.3
V
V_OUT
Regulated Output Voltage (LTC3388-1)
1.2V Output Selected; D1 = 0, D0 = 0
Sleep Threshold
l
1.208 1.260
V
Wake-Up Threshold
l 1.140 1.192
V
1.5V Output Selected; D1 = 0, D0 = 1
Sleep Threshold
l
1.508 1.560
V
Wake-Up Threshold
l 1.440 1.492
V
1.8V Output Selected; D1 = 1, D0 = 0
Sleep Threshold
l
1.808 1.863
V
Wake-Up Threshold
l 1.737 1.792
V
2.5V Output Selected; D1 = 1, D0 = 1
Sleep Threshold
l
2.508 2.600
V
Wake-Up Threshold
l 2.400 2.492
V
V_OUT
Regulated Output Voltage (LTC3388-3)
2.8V Output Selected; D1 = 0, D0 = 0
Sleep Threshold
l
2.816 2.912
V
Wake-Up Threshold
l 2.688 2.784
V
3.0V Output Selected; D1 = 0, D0 = 1
Sleep Threshold
l
3.016 3.105
V
Wake-Up Threshold
l 2.895 2.984
V
3.3V Output Selected; D1 = 1, D0 = 0
Sleep Threshold
l
3.316 3.399
V
Wake-Up Threshold
l 3.201 3.284
V
5.0V Output Selected; D1 = 1, D0 = 1
Sleep Threshold
l
5.016 5.180
V
Wake-Up Threshold
l 4.820 4.984
V
V_{OL, PGOOD}
I_VOUT
I_PEAK
I_OUT
R_{P, BUCK}
R_{N, BUCK}
PGOOD Threshold
PGOOD Output Low Voltage
Output Quiescent Current
PMOS Switch Peak Current
Available Output Current
PMOS Switch On-Resistance
NMOS Switch On-Resistance
Maximum Duty Cycle
As a Percentage of the Selected V_OUT
83
92
%
100μA Into Pin
l
0.2
V
LTC3388-1: V_OUT = 2.5V
LTC3388-3: V_OUT = 5.0V
60
nA
120
nA
l 100
150
210
mA
l 50
mA
1.1
Ω
1.3
Ω
l 100
%
338813f
3