LTC3221_15 Datasheet, PDF (3/12 Pages) Linear Technology – Micropower, Regulated Charge Pump

LTC3221/
LTC3221-3.3/LTC3221-5
ELECTRICAL CHARACTERISTICS ^{The ● denotes the specifications which apply over the full operating}
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 2.5V (LTC3221-3.3/LTC3221) or 3V (LTC3221-5), ⎯S⎯H⎯D⎯N = V_IN,
C_FLY = 1µF, C_IN = 2.2µF, C_OUT = 2.2µF, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
LTC3221-3.3/LTC3221-5
I⎯_S⎯_H⎯_D⎯_N
Shutdown Supply Current
V_IH
⎯S⎯H⎯D⎯N Input Threshold (High)
V_IL
⎯S⎯H⎯D⎯N Input Threshold (Low)
I_IH
⎯S⎯H⎯D⎯N Input Current (High)
I_IL
⎯S⎯H⎯D⎯N Input Current (Low)
LTC3221/LTC3221-3.3/LTC3221-5
V_OUT = 0V, ⎯S⎯H⎯D⎯N = 0V
⎯S⎯H⎯D⎯N = V_IN
⎯S⎯H⎯D⎯N = 0V
●
● 1.3
●
● –1
● –1
1
µA
V
0.4
V
1
µA
1
µA
f_OSC
V_UVLO
Switching Frequency
UVLO Threshold
V_OUT = 2.5V
600
kHz
1
V
Note 1: Absolute Maximum Ratings are those values beyond which the life operating temperature range are assured by design, characterization and
of a device may be impaired.
correlation with statisitical process controls.
Note 2: The LTC3221EDC-X is guaranteed to meet performance
specifications from 0°C to 70°C. Specificaiton over the –40°C to 85°C
Note 3: Guaranteed by design, not subject to test.
Note 4: R_OL = (2V_IN – V_OUT)/I_OUT.
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency vs
Supply Voltage
800
750
700
650
600
550
500
450
400
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G01
⎯S⎯H⎯D⎯N LO-to-HI Threshold vs
Temperature
0.9
0.8
V_IN = 3.2V
0.7
V_IN = 2.5V
0.6
V_IN = 1.8V
0.5
Oscillator Frequency vs
Temperature
800
750
700
650 ^{VIN = 4.5V}
600
V_IN = 2.5V
550
V_IN = 1.8V
500
450
400
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G02
⎯S⎯H⎯D⎯N HI-to-LO Threshold vs
Temperature
0.9
V_IN = 3.2V
0.8
0.7 ^VIN ^{= 2.5V}
0.6 V_IN = 1.8V
0.5
⎯S⎯H⎯D⎯N Threshold Voltage vs
Supply Voltage
0.9
0.8 LOW-TO-HIGH THRESHOLD
0.7
HIGH-TO-LOW THRESHOLD
0.6
0.5
0.4
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G03
Short-Circuit Current vs
Supply Voltage
150
T_A = –45°C
130
110
T_A = 90°C
T_A = 25°C
90
70
0.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G04
0.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3221 G05
50
1.5
2.0 2.5 3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
3221 G06
3221f
3