The MIC2660 IttyBittyTM charge pump functions as a lowcurrent, step-up converter where conventional inductor based, dc-to-dc converters are too complex and expensive. This device features a complete, self-contained charge pump in a tiny 5-lead SOT-23-5 package. The MIC2660 is powered from to 5V nominal supply and produces nominally as a function of the input voltage. The output is unregulated and follows a load-line type function. The MIC2660 can be used with or without external components. When used with two noncritical external capacitors, a 3V input will produce at 3.8mA. With no external components, a 3V input will produce at 2.5mA. The MIC2660 charge pump consists of an approximately 18MHz oscillator and a voltage tripler. The MIC2660 is available in the SOT-23-5 package and is rated for to +85°C ambient temperature range.

· 3V input produces approx. 5V unregulated output* 3.8mA with 1µF external output capacitor 2.5mA without external capacitor· 5V input produces approx. 9V unregulated output* 4.5mA output without external capacitor· CMOS-logic compatible enable· ESD protected

· Squib firing Refresh Burst/dump Low duty cycle load LCD bias generator Local 5V logic supply MOSFET driver Battery or solarcell boost

Pin Number Pin Name IN GND OUT NC EN Pin Function Supply (Input): to +5V supply. Ground: Power return. Output: Charge pump output. Connect to load. Not internally connected. Enable (Input): CMOS compatible input. EN high (VEN = VIN) enables the charge pump. EN low (VIN = 0V) disables the charge pump.

Input Voltage (VIN)..................................................... +5.5V Enable Voltage (VEN)......................................... VIN + 1.3V Ambient Temperature Range (TA)............. to +85°C Lead Temperature, Soldering 10sec........................ 300°C Package Thermal Resistance SOT-23-5 JA.................................................... 220°C/W SOT-23-5 JC.................................................... 130°C/W

Parameter Output Voltage, Enabled Condition (Note 1) VIN = 3V, VEN = VIN, COUT = 2k VIN = 5V, VEN = VIN, COUT = 2k Output Voltage, Disabled VIN = 3V, VEN = GND, COUT = 2k VIN = 5V, VEN = GND, COUT = 2k Input Current VIN = 3V, VEN = VIN, = 2k VIN = 5V, VEN = VIN, = 2k Quiescent Current VIN = 3V, VEN < 0.4V VIN = 5V, VEN < 0.4V Output Current VIN = 3V, VEN = VIN, VOUT = VOUT min VIN = 5V, VEN = VIN, VOUT = VOUT min Enable Threshold VIN = 3V VIN = 5V Enable Current Turn-On Time Turn-Off Time VIN = 5V, VEN = VIN = 3V VIN = 3V Load = 2k, COUT = 1000pF, Note 2 Load = 2k, COUT = 1000pF, Note Min 8.1.9 2.9 Typ Max Units ns µs

General Note: Devices are ESD protected, however handling precautions are recommended. Note 1: Note 2: Note 3: Typicals values = 25°C. Minimum and maximum values TA +85°C. Turn-on time is the time between VEN 0.5 × VIN and VOUT = 0.9 (VOUTmax ­ VOUTmin) for a rising EN input. Turn-off time is the time between VEN 0.5 × VIN and VOUT = VIN ­ 1.9V for a falling EN input.

20 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) COUT = NONE C NO LOAD 5 1mA SUPPLY VOLTAGE (V) 2mA 20 OUTPUT VOLTAGE (V) COUT = NONE C NO LOAD 5 1mA SUPPLY VOLTAGE (V) 5.0 2mA