LTC3388-1_15 Datasheet, PDF (4/20 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_IH
V_{IL(D0, D1)}
V_IL(EN,STBY)
I_IH
I_IL
D0/D1/EN/STBY Input High Voltage
D0/D1 Input Low Voltage
EN/STBY Input Low Voltage
D0/D1/EN/STBY Input High Current
D0/D1/EN/STBY Input Low Current
Additional I_Q at V_IN with EN at V_IH(MIN)
Additional I_Q at V_IN with STBY at V_IH(MIN)
V_EN = 1.2V, V_IN = 4V
V_STBY = 1.2V, V_IN = 4V
l 1.2
V
l
0.4
V
l
150
mV
10
nA
10
nA
40
nA
40
nA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3388-1/LTC3388-3 are tested under pulsed load conditions
such that T_J ≈ T_A. The LTC3388E-1/LTC3388E-3 are guaranteed to meet
specifications from 0°C to 85°C junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTC3388I-1/LTC3388I-3 are guaranteed over the –40°C to 125°C
operating junction temperature range. Note that the maximum ambient
temperature consistent with these specifications is determined by specific
operating conditions in conjunction with board layout, the rated package
thermal impedance and other environmental factors.
Note 3: The junction temperature (T_J, in °C) is calculated from the ambient
temperature (T_A, in °C) and power dissipation (PD, in Watts) according
to the formula: T_J = T_A + (P_D • θ_JA), where θ_JA (in °C/W) is the package
thermal impedance.
Note 4: Dynamic supply current is higher due to gate charge being
delivered at the switching frequency.
TYPICAL PERFORMANCE CHARACTERISTICS
Input I_Q vs V_IN, UVLO
800
700
125°C
600
85°C
500
400
25°C
300
–40°C
200
100
0
0
0.5
1
1.5
2
2.5
V_IN (V)
338813 G01
Input I_Q vs V_IN, No Load
1600
D1 = D0 = 0
125°C
1400
1200
85°C
1000
800
600
25°C
–40°C
400
200
2 4 6 8 10 12 14 16 18 20
V_IN (V)
338813 G02
Input I_Q vs V_IN, EN Low
1200
125°C
1000
800
85°C
600
25°C
–40°C
400
200
0
0 2 4 6 8 10 12 14 16 18 20
V_IN (V)
338813 G03
338813f
4