Datasheet MAX889 (Maxim) - 2

High-Frequency, Regulated, 200mA, Inverting Charge Pump ABSOLUTE MAXIMUM RATINGS
IN to GND ...-0.3V to +6V Continuous Power Dissipation (TA = +70°C) FB, SHDN, CAP+ to GND ..-0.3V to (VIN + 0.3V) 8-Pin SO (derate 5.88mW/°C above +70°C)...471mW AGND to GND ...-0.3V to +0.3V Operating Temperature Range...-40°C to +85°C OUT to GND ...-6V to +0.3V Junction Temperature ..+150°C CAP- to GND ..(VOUT - 0.3V) to +0.3V Storage Temperature Range ...-65°C to +150°C Continuous Output Current ...250mA Lead Temperature (soldering, 10s) ..+300°C
MAX889
Output Short-Circuit Duration..Indefinite Stresses beyond 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 beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = V SHDN = +5V, capacitors from Table 1,
TA
=
0
°
C to +85
°
C
, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VIN RLOAD = 100Ω 2.7 5.5 V Output Voltage Range VOUT R LOAD = 100Ω -2.5 -VIN V IOUT(MAX)1 VIN = 5V, VOUT = -3.3V 200 Maximum Output Current mA IOUT(MAX)2 VIN = 3.3V, VOUT = -2.5V 145 MAX889R 6 12 Quiescent Supply IQ(FREE-RUN) No load, VFB = VIN MAX889S 12 24 mA Current (Free-Run Mode) MAX889T 24 48 MAX889R 3.3 7 Quiescent Supply No load, V I OUT regulated to Q(REGULATED) MAX889S 5.5 12 mA Current (Regulated Mode) -3.3V MAX889T 11 22 Shutdown Supply Current I SHDN V SHDN = 0 0.1 50 µA Open-Loop Output RO VFB = VIN 2.0 4.5 Ω Resistance (Free-Run Mode) Output Resistance RO(REG1) VOUT regulated to -3.3V 0.05 Ω SHDN, FB Input Bias Current ±1 µA FB Input Offset Voltage ILOAD = 0 ±3 ±35 mV Load Regulation IOUT = 0 to 200mA 10 mV IN Undervoltage Lockout VIN rising (30mV hysteresis) 2.3 2.6 V Threshold SHDN Logic High VIH 0.7 x VIN V V SHDN IN = +2.7V to +5.5V Logic Low VIL 0.3 x VIN MAX889R 0.375 0.5 0.62 Switching Frequency fOSC MAX889S 0.75 1 1.25 MHz MAX889T 1.5 2 2.5 Junction temperature rising Thermal Shutdown Threshold 160 °C (15°C hysteresis)
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