MAX889 19-1774 Rev 0 7/00 High-Frequency, Regulated, 200mA, Inverting Charge Pump General Description Features The MAX889 inverting charge pump delivers a regulated 200mA Output Current negative output voltage at loads of up to 200mA. The Up to 2MHz Switching Frequency device operates with inputs from 2.7V to 5.5V to produce an adjustable, regulated output from -2.5V to -V . IN Small Capacitors (1F) The MAX889 is available with an operating frequency of +2.7V to +5.5V Input Voltage Range 2MHz (T version), 1MHz (S version), or 0.5MHz (R ver- Adjustable Regulated Negative Output sion). The higher switching frequency devices allow the use of smaller capacitors for space-limited applica- (-2.5V to -V ) IN tions. The lower frequency devices have lower quies- 0.1A Logic-Controlled Shutdown cent current. Low 0.05 Output Resistance (in regulation) The MAX889 also features a 0.1A logic-controlled shutdown mode and is available in an 8-pin SO pack- Soft-Start and Foldback Current Limited age. An evaluation kit, MAX889SEVKIT, is available. Short-Circuit and Thermal Shutdown Protected 8-Pin SO Package Applications Ordering Information TFT Panels TEMP. PIN- SWITCHING PART RANGE PACKAGE FREQUENCY Hard Disk Drives MAX889TESA -40C to +85C 8 SO 2MHz Camcorders MAX889SESA -40C to +85C 8 SO 1MHz Digital Cameras MAX889RESA -40C to +85C 8 SO 0.5MHz Measurement Instruments Battery-Powered Applications Typical Operating Circuit Pin Configuration INPUT +2.7V TO +5.5V TOP VIEW ON IN REGULATED IN 1 8 AGND SHDN FB OFF NEGATIVE OUTPUT CAP+ 2 7 FB CAP+ (UP TO -1 V , IN MAX889 MAX889 UP TO 200mA) GND 3 6 SHDN OUT CAP- CAP- 4 5 OUT AGND GND SO Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. EVALUATION KIT AVAILABLEHigh-Frequency, Regulated, 200mA, Inverting Charge Pump ABSOLUTE MAXIMUM RATINGS IN to GND.................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A FB, SHDN, CAP+ to GND............................-0.3V to (V + 0.3V) 8-Pin SO (derate 5.88mW/C above +70C)...............471mW IN AGND to GND .......................................................-0.3V to +0.3V Operating Temperature Range...........................-40C to +85C OUT to GND .............................................................-6V to +0.3V Junction Temperature......................................................+150C CAP- to GND ............................................(V - 0.3V) to +0.3V Storage Temperature Range .............................-65C to +150C OUT Continuous Output Current...............................................250mA Lead Temperature (soldering, 10s) ................................+300C 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 (V = V = +5V, capacitors from Table 1, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) IN SHDN A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V R = 100 2.7 5.5 V IN LOAD Output Voltage Range V R = 100 -2.5 -V V OUT LOAD IN I OUT(MAX)1 V = 5V, V = -3.3V 200 IN OUT Maximum Output Current mA I OUT(MAX)2 V = 3.3V, V = -2.5V 145 IN OUT MAX889R 6 12 Quiescent Supply I No load, V V MAX889S 12 24 mA Q(FREE-RUN) FB = IN Current (Free-Run Mode) MAX889T 24 48 MAX889R 3.3 7 Quiescent Supply No load, V regulated to OUT I mA MAX889S 5.5 12 Q(REGULATED) Current (Regulated Mode) -3.3V MAX889T 11 22 Shutdown Supply Current I V = 0 0.1 50 A SHDN SHDN Open-Loop Output R V = V 2.0 4.5 O FB IN Resistance (Free-Run Mode) Output Resistance R V regulated to -3.3V 0.05 O(REG1) OUT SHDN, FB Input Bias Current 1 A FB Input Offset Voltage I = 0 3 35 mV LOAD Load Regulation I = 0 to 200mA 10 mV OUT IN Undervoltage Lockout V rising (30mV hysteresis) 2.3 2.6 V IN Threshold SHDN Logic High V 0.7 x V IH IN V = +2.7V to +5.5V V IN SHDN Logic Low V 0.3 x V IL IN 0.62 MAX889R 0.375 0.5 Switching Frequency f MAX889S 0.75 1 1.25 MHz OSC MAX889T 1.5 2 2.5 Junction temperature rising Thermal Shutdown Threshold 160 C (15C hysteresis) 2 MAX889