3
LTC1682/LTC1682-3.3/LTC1682-5
PARAMETER CONDITIONS MIN TYP MAX UNITS
CPO (Charge Pump Output) V
IN
= 1.8V, I
OUT
= 10mA ● 18 30 Ω
Output Resistance V
IN
= 3V, I
OUT
= 10mA ● 13 20 Ω
V
IN
= 4.4V, I
OUT
= 10mA ● 11 17 Ω
V
OUT
Dropout Voltage (Note 3) LTC1682, I
OUT
= 10mA, V
OUT
= 2.57V (Note 5) ● 100 160 mV
LTC1682/LTC1682-3.3, I
OUT
= 10mA, V
OUT
= 3.3V ● 75 120 mV
LTC1682/LTC1682-5, I
OUT
= 10mA, V
OUT
= 5V ● 50 90 mV
V
OUT
Enable Time I
OUT
= 10mA 2 ms
V
OUT
Output Noise Voltage LTC1682 I
OUT
= 10mA, 10Hz ≤ f ≤ 100kHz, V
OUT
= 5V 88 µV
RMS
I
OUT
= 10mA, 10Hz ≤ f ≤ 2.5MHz, V
OUT
= 5V 800 µV
P-P
LTC1682-3.3 I
OUT
= 10mA, 10Hz ≤ f ≤ 100kHz, C
FILT
= 1nF 58 µV
RMS
I
OUT
= 10mA, 10Hz ≤ f ≤ 2.5MHz, C
FILT
= 1nF 500 µV
P-P
LTC1682-5 I
OUT
= 10mA, 10Hz ≤ f ≤ 100kHz, C
FILT
= 1nF 64 µV
RMS
I
OUT
= 10mA, 10Hz ≤ f ≤ 2.5MHz, C
FILT
= 1nF 600 µV
P-P
V
OUT
Line Regulation V
IN
= 3V to 4V, I
OUT
= 0mA (Note 6) ● 520 mV
V
OUT
Load Regulation I
OUT
= 1mA to 10mA ● 310 mV
I
OUT
= 1mA to 50mA (Note 4) 10 mV
V
OUT
Shutdown Resistance SHDN = 0V, Resistance Measured to Ground, V
IN
= 1.8V ● 150 350 Ω
SHDN = 0V, Resistance Measured to Ground, V
IN
= 4.4V ● 50 150 Ω
SHDN Input Threshold V
IN
= 1.8V to 4.4V ● 0.4 1 1.6 V
SHDN Input Current SHDN = V
IN
● –1 1 µA
SHDN = 0V
● –1 1 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1682C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40°C and 85°C. The
LTC1682I is guaranteed to meet the extended temperature limits.
Note 3: Dropout voltage is the minimum input/output voltage required to
maintain regulation at the specified output current. In dropout the output
voltage will be equal to: V
CPO
– V
DROPOUT
(see Figure 4).
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output specification will not apply for all
possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range may be
limited. When operating at maximum output current, the input voltage
range may be limited.
Note 5: Limited by the LDO disable switch point of 1.45V
IN
.
Note 6: The LTC1682 is set to 5V. The feedback current is 25µA.
The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are T
A
= 25°C. SHDN = V
IN
= 3V; C1 = 0.22µF; C2, C3, C4 = 4.7µF, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
