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Part: TC1219
Category:
Power Management
-> DC-DC Converters
-> Charge Pumps
Description: The TC1219/1220 Are CMOS "charge-pump" Voltage Converters in Ultra-small 6-Pin SOT-23A Packages
Company: Microchip Technology, Inc.
Datasheet: Download TC1219 datasheet File size : 162 kB
Request For quote: Find where to buy TC1219
Datasheet text preview:
Switched Capacitor Voltage Converters with Shutdown in SOT Packages
Features
· · · · · · · · · Charge Pumps in 6-Pin SOT-23A Package >95% Voltage Conversion Efficiency Voltage Inversion and/or Doubling Operates from +2.5V to +5.5V Up to 25mA Output Current Only Two External Capacitors Required Low Power Consumption Power-Saving Shutdown Mode TC1220 Compatible with 1.8V Logic Systems
M
TC1219/TC1220
General Description
The TC1219/TC1220 are CMOS "charge-pump" voltage converters in ultra-small 6-Pin SOT-23A packages. They invert and/or double an input voltage which can range from +2.5V to +5.5V. Conversion efficiency is typically >95%. Switching frequency is 12kHz for the TC1219, 35kHz for the TC1220. When the shutdown pin is held at a logic low, the device goes into a very low power mode of operation, consuming less than 1µA of supply current. External component requirement is only two capacitors for standard voltage inverter applications. With a few additional components a positive doubler can also be built. All other circuitry, including control, oscillator, power MOSFETs are integrated on-chip. Typical supply currents are 60µA (TC1219), 115µA (TC1220). All devices are available in 6-pin SOT-23A surface mount packages.
Applications
· · · · · LCD Panel Bias Cellular Phones Pagers PDAs, Portable Dataloggers Battery-Powered Devices
Functional Block Diagram Device Selection Table
Part Number Package Osc. Freq. (kHz) 12 35 Operating Temp. Range -40°C to +85°C -40°C to +85°C
Negative Voltage Inverter
C+ + C1 C VIN Input
TC1219ECH 6-Pin SOT-23A TC1220ECH 6-Pin SOT-23A
TC1219 TC1220
ON SHDN OFF
Package Type
6-Pin SOT-23A
C+ 6 SHDN 5 GND 4
OUT GND C2 +
V Output
TC1219ECH TC1220ECH
1 OUT 2 VIN 3 C
NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74
2002 Microchip Technology Inc.
DS 21366B- page 1
TC1219/TC1220
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.
TC1219/TC1220 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = -40°C to +85°C, VIN = +5V, C1 = C2 = 10µF, (TC1219), C1 = C2 = 3.3µF (TC1220), TA = 25°C unless otherwise noted. Symbol IDD ISHDN VMIN VMAX FOSC VIH P a r a m e te r Supply Current Shutdown Supply Current Minimum Supply Voltage Maximum Supply Voltage Oscillator Frequency SHDN Input Logic High M in -- -- -- 2.5 -- 6 19 -- 1.5 1.8 1.5 -- -- -- 95 -- Typ 60 115 0. 1 -- -- 12 35 -- -- -- -- -- 96 95 99.9 25 Ma x 115 325 1. 0 -- 5. 5 20 56.3 -- -- -- -- 0. 5 -- -- -- 65 Units
µA µA
Devi ce TC1219 TC1220
Test Conditions
SHDN = GND, VIN = 5V (Note 2) RLOAD = 1k RLOAD = 1k TC1219 TC1220 TC1219 TC1220 RLOAD = VIN = VMIN to 3V VIN = >3V to VMAX VIN = VMIN to VMAX VIN = VMIN to VMAX RLOAD = 1k RLOAD = TC1219/TC1220 ILOAD = 0.5mA to 25mA (Note 1)
V V kHz V
VIL PEFF VEFF ROUT
Note 1: 2:
SHDN Input Logic Low Power Efficiency Voltage Conversion Efficiency Output Resistance
V % %
Capacitor contribution is approximately 20% of the output impedance [ESR = 1/ pump frequency x capacitance]. VIN is guaranteed to be disconnected from OUT when the converter is in shutdown..
DS2136 6B-page 2
2002 Microchip Technology Inc.
TC1219/TC1220
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (6-Pin SOT-23A) 1 2 3 4 5 6
PIN FUNCTION TABLE
Symbol O UT VIN C G ND S HDN C
+
Description Inverting charge pump output. Positive power supply input. Commutation capacitor negative terminal. G ro u n d . Shutdown input (active low). Commutation capacitor positive terminal.
2002 Microchip Technology Inc.
DS 21366B- page 3
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