TC1240_13 Datasheet, PDF (3/18 Pages) Microchip Technology – Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package

TC1240/TC1240A
TC1240A ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise noted, typical values apply at T_A = +25°C. Minimum and maximum
values apply for T_A = -40° to +85°C, and V_IN = +5.0V, C₁ = C₂ = 3.3 µF, SHDN = GND.
Parameters
Sym Min Typ Max Units
Conditions
Supply Current
Shutdown Supply Current
Minimum Supply Voltage
Maximum Supply Voltage
Output Current
Sum of the R_DS(ON) of the
internal MOSFET Switches
I_DD
—
550 900 µA R_LOAD = 
I_SHDN
—
0.01 1.0
µA SHDN = V_IN
V_MIN
2.5
—
—
V
V_MAX
—
—
5.5
V
I_LOAD
20
—
— mA
R_SW
—
4
8
 I_LOAD = 20 mA
Oscillator Frequency
Switching Frequency (Note 1)
Shutdown Input Logic High
Shutdown Input Logic Low
Power Efficiency
Voltage Conversion Efficiency
Output Resistance (Note 2)
F_OSC
F_SW
V_IH
V_IL
P_EFF
V_EFF
R_OUT
— 160 — kHz
40
80 125 kHz
1.4
—
—
V
—
—
0.4
V
86
94
—
%
99 99.96 —
%
—
12
—

—
—
25
Note 1: Switching frequency is one-half internal oscillator frequency.
T_A = -40°C to +85°C
T_A = -40°C to +85°C
V_IN = V_MIN to V_MAX
V_IN = V_MIN to V_MAX
I_LOAD = 5 mA
R_LOAD = 
I_LOAD = 20 µA
T_A = -40°C to +85°C
2: Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / switching frequency x
capacitance].
 2001-2012 Microchip Technology Inc.
DS21516D-page 3