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TC1121

100mA Charge Pump Voltage Converter with Shutdown

Microchip Technology 

TC1121

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage (VDD) ............................................... 6V

OSC, FC, SHDN Input Voltage .....-0.3V to (V+ + 0.3V)

Output Short Circuit Duration ........................... 10 Sec.

Package Power Dissipation (TA ≤ 70°C)

8-Pin PDIP .............................................. 730 mW

8-Pin SOIC .............................................. 470 mW

8-Pin MSOP ............................................ 333 mW

Operating Temperature Range

C Suffix............................................ 0°C to +70°C

E Suffix......................................... -40°C to +85°C

Storage Temperature Range.............. -65°C to +150°C

*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.

TC1121 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: TA = 0°C to 70°C (C suffix), -40°C to +85°C (E suffix), V+= 5V ±10% COSC = Open, C1, C2 = 10 μF,

FC = V+, SHDN = VIH, typical values are at TA = 25°C unless otherwise noted.

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

IDD

Active Supply Current

ISHUTDOWN Shutdown Supply Current

V+

Supply Voltage

—

50

100

μA RL = Open, FC = Open or GND

—

0.6

1

mA RL = Open, FC = V+

—

0.2

1.0

μA SHDN = 0V

2.4

—

5.5

V

VIH

SHDN Input Logic High

VDD x 0.8

—

—

V

VIL

SHDN Input Logic Low

—

—

0.4

V

IIN

Input Leakage Current

-1

—

-4

—

1

μA SHDN, OSC

4

FC pin

ROUT

IOUT

FOSC

PEFF

VEFF

Note 1:

Output Source Resistance

—

12

20

Ω IOUT = 60 mA

Output Current

60

100

VOUT = more negative than -3.75V

Oscillator Frequency

5

10

100

200

—

kHz Pin 7 Open, Pin 1 Open or GND

—

SHDN = VIH, Pin 1 = V+

Power Efficiency

—

—

—

% FC = GND for all

93

97

—

RL = 2k between V+ and VOUT

94

97

—

RL = 1kΩ between VOUT and GND

—

92

IL = 60 mA to GND

Voltage Conversion Efficiency

99

99.9

—

% RL = Open

Connecting any input terminal to voltages greater than V+ or less than GND may cause destructive latch-up. It is recommended that no

inputs from sources operating from external supplies be applied prior to “power up” of the TC1121.

© 2006 Microchip Technology Inc.

DS21358C-page 3

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