LTC3225-1_15 Datasheet, PDF (3/14 Pages) Linear Technology – 150mA Supercapacitor Charger

LTC3225/LTC3225-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, C_IN = 2.2μF, C_FLY = 1μF, unless otherwise specified (Note 3).
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_IN
Input Voltage Range
V_COUT
Charge Termination Voltage
Sleep Mode Threshold (Rising Edge)
V_COUT-HYS
V_TOP/BOT
Output Comparator Hysteresis
Maximum Voltage Across Each of the
Supercapacitors After Charging
LTC3225/LTC3225-1
V_SEL = V_IN
V_SEL = 0
V_SEL = V_IN
V_SEL = 0
V_SEL = V_IN
V_SEL = 0
l 2.8
l 2.8
5.5
V
5.5
V
l 4.4
4.5
4.6
V
l 3.9
4.0
4.1
V
100
mV
l
2.35
V
l
2.1
V
I_Q-VIN
I_SHDN-VIN
I_COUT
No Load Operating Current at V_IN
Shutdown Current
C_OUT Leakage Current
I_OUT = 0mA
l
SHDN = 0V, V_OUT = 0V
l
V_OUT = 5.6V, SHDN = 0V
l
V_OUT
V_OUT
=
=
5.6V,
5.6V,
Charge Pump in Sleep Mode
SHDN Connected to V_IN with
l
Input Supply Removed
20
40
μA
0.1
1
μA
1
3
μA
2
4
μA
1
μA
I_VIN
Input Charge Current
I_OUT
Output Charge Current
V_PGOOD
PGOOD Low Output Voltage
V_IN = 3.6V, R_PROG = 12k, C_TOP = C_BOT
306
mA
V_IN = 3.6V, R_PROG = 60k, C_TOP = C_BOT
55
mA
V_IN = 3.6V, R_PROG = 12k, C_TOP = C_BOT,
V_OUT = 4.5V (LTC3225),
V_OUT = 3.7V (LTC3225-1)
125
150
175
mA
V_IN = 3.6V, R_PROG = 60k, C_TOP = C_BOT,
V_OUT = 4.5V (LTC3225),
V_OUT = 3.7V (LTC3225-1)
26
mA
I_PGOOD = –1.6mA
l
0.4
V
I_PGOOD-LEAK PGOOD High Impedance Leakage Current V_PGOOD = 5V
l
10
μA
V_PG
PGOOD Low-to-High Threshold
Relative to Output Voltage Threshold
l 92
94
96
%
V_PG-HYS
PGOOD Threshold Hysteresis
Relative to Output Voltage Threshold
l 0.25
1.2
2.5
%
R_OL
f_OSC
V_SEL, SHDN
Effective Open-Loop Output Impedance
(Note 4)
CLK Frequency
V_IN = 3.6V, V_OUT = 4.5V (LTC3225)
V_IN = 3.6V, V_OUT = 3.7V (LTC3225-1)
8
Ω
9
l 0.6
0.9
1.5
MHz
V_IH
Input High Voltage
l 1.3
V
V_IL
Input Low Voltage
l
0.4
V
I_IH
Input High Current
l –1
1
μA
I_IL
Input Low Current
l –1
1
μA
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: Based on long-term current density limitations.
Note 3: The LTC3225/LTC3225-1 are tested under pulsed load conditions
such that T_J ≈ T_A. The LTC3225/LTC3225-1 are guaranteed to meet
performance specifications from 0°C to 85°C. Specifications over the
–40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 4: Output not in regulation;
R_OL ≡ (2 • V_IN – V_OUT)/I_OUT
3225fb
3