LTC3209-1/LTC3209-2
4
320912fa
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 LTC3209-1/LTC3209-2 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: 1.5x mode output impedance is defined as (1.5V
BAT
– V
CPO
)/I
OUT
.
2x mode output impedance is defined as (2V
BAT
– V
CPO
)/I
OUT
.
Note 4: Based on long term current density limitations. Assumes an
operating duty cycle of ≤ 10% under absolute maximum conditions for
duration less than 10 seconds. Max Charge Pump current for continuous
operation is 300mA.
Note 5: Based on long term current density limitations.
Note 6: All values are referrenced to V
IH
and V
IL
levels.
Note 7: Guaranteed by design.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Mode Switch Fast Dropout Times
1ms/DIV
V
CPO
1V/DIV
320912 G01
1x
1.5x
2x
V
BAT
= 3.6V
REGC C2 = Hi
1.5x Mode CPO Ripple 2x Mode CPO Ripple
1x Mode Switch Resistance
vs Temperature
1.5x Mode Charge Pump Open-
Loop Output Resistance vs
Temperature (1.5V
BAT
–V
CPO
)/I
CPO
TEMPERATURE (°C)
–40
0.35
SWITCH RESISTANCE (Ω)
0.40
0.45
0.50
0.55
0.60
0.65
–15 10 35 60
3209 G05
85
I
CPO
= 200mA
V
BAT
= 3.3V
V
BAT
= 3.6V
V
BAT
= 3.9V
TEMPERATURE (°C)
–40
2.0
OPEN-LOOP OUTPUT RESISTANCE (Ω)
2.2
2.4
2.6
2.8
3.0
3.2
–15 10 35 60
3209 G06
85
V
BAT
= 3V
V
CPO
= 4.2V
C2 = C3 = C4 = 2.2µF
500ns/DIV
V
CPO
20mV/DIV
AC COUPLED
320912 G02
V
BAT
= 3.6V
I
CPO
= 200mA
C
CPO
= 2.2µF
500ns/DIV
V
CPO
20mV/DIV
AC COUPLED
320912 G03
V
BAT
= 3.6V
I
CPO
= 200mA
C
CPO
= 2.2µF
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
BAT1,2
= 3.6V, DV
CC
= 3V, R
REF
= 24.3k, C1 = C2 = C3 = C4 = 2.2
µ
F,
unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
1.5x Mode CPO Voltage
vs Load Current
LOAD CURRENT (mA)
3.6
CPO VOLTAGE (V)
4.0
4.4
4.8
3.8
4.2
4.6
100 200 300 400
3209 G07
5000
C2 = C3 = C4 = 2.2µF
V
BAT
= 3V
3.2V
3.3V
3.4V
3.5V
3.6V
3.1V
T
A
= 25°C unless otherwise noted
t
SP
Spike Suppression Time 50 ns
R
REF
VR
REF
R
REF
= 24.3k ● 1.20 1.23 1.26 V
RR
REF
Reference Resistor Range 20 30 kΩ
