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TC1222

High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages

Microchip Technology 

TC1221/TC1222

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Input Voltage (VIN to GND)....................... +6.0V, -0.3V

Output Voltage (OUT to GND).................. -6.0V, +0.3V

Current at OUT Pin..............................................50mA

Short-Circuit Duration – OUT to GND ............Indefinite

Power Dissipation (TA ≤ 70°C)

6-Pin SOT-23A .........................................240mW

Operating Temperature Range.............-40°C to +85°C

Storage Temperature (Unbiased) .......-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 = -40°C to +85°C, VIN = +5V, C1 = C2 = 1µF, (TC1221), C1 = C2 = 0.22µF (TC1222), Typical values

are at TA = +25°C.

Symbol

Parameter

Min Typ Max Units Device

Test Conditions

IDD

Supply Current

— 290 600

— 1800 2800

µA TC1221

TC1222

ISHDN

VMIN

VMAX

FOSC

Shutdown Supply Current

Minimum Supply Voltage

Maximum Supply Voltage

Oscillator Frequency

— 0.01 1.0

1.8 —

—

—

—

5.5

81 125 169

550 750 950

µA

V

V

kHz TC1221

TC1222

SHDN = GND, VIN = 5V (Note 2)

RLOAD = 1kΩ

RLOAD = 1kΩ

VIH

VIL

PEFF

SHDN Input Logic High

SHDN Input Logic Low

Power Efficiency

1.4

—

—

—

0.4

—

90

—

—

70

—

V

VIN = VMIN to VMAX

V

VIN = VMIN to VMAX

% TC1221 RLOAD = 1kΩ

TC1222

VEFF

Voltage Conversion Efficiency

94

96

—

%

ROUT

Output Resistance

—

25

65

Ω

—

RLOAD = ∞

ILOAD = 0.5mA to 25mA (Note 1)

TWK

Wake-up Time From Shutdown

—

80

—

µsec TC1221 RLOAD = 1kΩ

Mode

—

25

—

TC1222

Note 1: Capacitor contribution is approximately 20% of the output impedance [ESR = 1/ pump frequency x capacitance].

2: VIN is guaranteed to be disconnected from OUT when the converter is in shutdown..

DS21367B-page 2

 2002 Microchip Technology Inc.

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