tc1240a Microchip Technology Inc., tc1240a Datasheet - Page 2

• Manufacturer Part Number: tc1240a
• Description: Positive Doubling Charge Pumps With Shutdown In A Sot-23 Package
• Manufacturer: Microchip Technology Inc.

TC1240/TC1240A
1.0
Absolute Maximum Ratings †
Input Voltage (V
Output Voltage (V
Current at V
Short-Circuit Duration: V
Thermal Resistance .......................................210°C/W
Power Dissipation (
Operating Temperature Range............. -40°C to +85°C
Storage Temperature (Unbiased) ....... -65°C to +150°C
TC1240 ELECTRICAL SPECIFICATIONS
DS21516C-page 2
Electrical Specifications: Unless otherwise noted, typical values apply at T
ues apply for T
Supply Current
Shutdown Supply Current
Minimum Supply Voltage
Maximum Supply Voltage
Oscillator Frequency
Switching Frequency (Note 1)
Shutdown Input Logic High
Shutdown Input Logic Low
Power Efficiency
Voltage Conversion Efficiency
Output Resistance (Note 2)
Note 1:
TC1240 ............................................. +4.5V, -0.3V
TC1240A ........................................... +5.8V, -0.3V
TC1240 ....................................... +9.0V, V
TC1240A ................................... +11.6V, V
2:
ELECTRICAL
CHARACTERISTICS
Parameters
Switching frequency is one-half internal oscillator frequency.
Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / switching frequency x
capacitance].
OUT
A
IN
Pin............................................50 mA
= -40° to +85°C, and V
OUT
to GND)
T
A
= +25
to GND)
OUT
°C)........................600 mW
to GND .............Indefinite
I
V
F
R
Sym
V
P
V
SHDN
F
I
V
V
OSC
MAX
DD
EFF
EFF
OUT
MIN
SW
IH
IL
IN
= +2.8V, C
97.5
Min
2.5
1.4
40
86
IN
IN
—
—
—
—
—
—
—
-0.3V
-0.3V
1
99.96
Typ
180
160
0.1
= C
80
93
17
—
—
—
—
—
2
= 3.3 µF, SHDN = GND.
Max
300
125
† Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
1.0
4.0
0.4
30
—
—
—
—
—
—
Units
kHz
kHz
µA
µA
%
%
V
V
V
V
Ω
A
R
SHDN = V
R
R
T
T
V
V
R
R
R
T
= +25°C. Minimum and maximum val-
A
A
A
IN
IN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
= -40°C to +85°C
= -40°C to +85°C
= -40°C to +85°C
= V
= V
= ∞
= 1.0 kΩ
= 1.0 kΩ
= 1.0 kΩ
= ∞
= 1.0 kΩ
MIN
MIN
 2003 Microchip Technology Inc.
IN
to V
to V
Conditions
MAX
MAX