LTC1682-5_15 Datasheet, PDF (3/12 Pages) Linear Technology – Doubler Charge Pumps with Low Noise Linear Regulator

LTC1682/LTC1682-3.3/LTC1682-5
ELECTRICAL CHARACTERISTICS The q 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.
PARAMETER
CPO (Charge Pump Output)
Output Resistance
V_OUT Dropout Voltage (Note 3)
V_OUT Enable Time
V_OUT Output Noise Voltage
V_OUT Line Regulation
V_OUT Load Regulation
V_OUT Shutdown Resistance
SHDN Input Threshold
SHDN Input Current
CONDITIONS
V_IN = 1.8V, I_OUT = 10mA
V_IN = 3V, I_OUT = 10mA
V_IN = 4.4V, I_OUT = 10mA
LTC1682, I_OUT = 10mA, V_OUT = 2.57V (Note 5)
LTC1682/LTC1682-3.3, I_OUT = 10mA, V_OUT = 3.3V
LTC1682/LTC1682-5, I_OUT = 10mA, V_OUT = 5V
I_OUT = 10mA
LTC1682
I_OUT = 10mA, 10Hz ≤ f ≤ 100kHz, V_OUT = 5V
I_OUT = 10mA, 10Hz ≤ f ≤ 2.5MHz, V_OUT = 5V
LTC1682-3.3
I_OUT = 10mA, 10Hz ≤ f ≤ 100kHz, C_FILT = 1nF
I_OUT = 10mA, 10Hz ≤ f ≤ 2.5MHz, C_FILT = 1nF
LTC1682-5
I_OUT = 10mA, 10Hz ≤ f ≤ 100kHz, C_FILT = 1nF
I_OUT = 10mA, 10Hz ≤ f ≤ 2.5MHz, C_FILT = 1nF
V_IN = 3V to 4V, I_OUT = 0mA (Note 6)
I_OUT = 1mA to 10mA
I_OUT = 1mA to 50mA (Note 4)
SHDN = 0V, Resistance Measured to Ground, V_IN = 1.8V
SHDN = 0V, Resistance Measured to Ground, V_IN = 4.4V
V_IN = 1.8V to 4.4V
SHDN = V_IN
SHDN = 0V
MIN
q
q
q
q
q
q
q
q
q
q
q 0.4
q –1
q –1
TYP MAX
18
30
13
20
11
17
100 160
75
120
50
90
2
88
800
58
500
64
600
5
20
3
10
10
150 350
50
150
1
1.6
1
1
UNITS
Ω
Ω
Ω
mV
mV
mV
ms
µV_RMS
µV_P-P
µV_RMS
µV_P-P
µV_RMS
µV_P-P
mV
mV
mV
Ω
Ω
V
µA
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.
3