MAX1735 19-1783 Rev 1 11/03 200mA, Negative-Output, Low-Dropout Linear Regulator in SOT23 General Description Features The MAX1735 negative-output, low-dropout linear regu- Guaranteed 200mA Output Current lator operates from a -2.5V to -6.5V input and delivers a Low 80mV Dropout Voltage at 200mA guaranteed 200mA with a low 80mV dropout. The high- accuracy (1%) output voltage is preset or can be Low 85A Quiescent Supply Current adjusted from -1.25V to -5.5V with an external resistive Low 1nA Current Shutdown Mode voltage-divider. An internal N-channel MOSFET allows for a low 85A Stable with 1F C OUT quiescent current virtually independent of the load, PSRR >60dB at 100Hz making this device ideal for battery-powered portable equipment, such as PDAs, mobile phones, cordless Thermal Overload Protection phones, and wireless data modems. Short-Circuit Protection The device is available in several preset output voltage -5.0V, -3.0V, or -2.5V Output Voltage versions: -5.0V, -3.0V, and -2.5V. All versions offer a or Adjustable (-1.25V to -5.5V) 1nA low-power shutdown mode, short-circuit protec- tion, and thermal overload protection. The device is Tiny SOT23-5 Package offered in a tiny 5-pin SOT23 package. Applications Ordering Information Disk Drives PIN- PART TEMP RANGE PACKAGE Modems MAX1735EUK50-T -40C to +85C 5 SOT23-5 Instrumentation Amplifiers MAX1735EUK30-T -40C to +85C 5 SOT23-5 Notebook Computers MAX1735EUK25-T -40C to +85C 5 SOT23-5 Mobile and Cordless Telephones PCMCIA Cards GaAsFET Bias Output-Voltage Selector Guide Mobile Wireless Data Modems PRESET OUTPUT SOT TOP PART PDAs and Palmtop Computers VOLTAGE MARK MAX1735EUK50-T -5.0V or adj ADOZ MAX1735EUK30-T -3.0V or adj ADOY MAX1735EUK25-T -2.5V or adj ADOX Typical Operating Circuit Pin Configuration -5V, -3V, OR -2.5V TOP VIEW -6.5V TO -2.5V OUTPUT INPUT UP TO 200mA IN OUT GND15 OUT C IN C OUT MAX1735 MAX1735 2 IN ON OFF SET GND SHDN ON SHDN34 SET GND SOT23-5 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.200mA, Negative-Output, Low-Dropout Linear Regulator in SOT23 ABSOLUTE MAXIMUM RATINGS IN, SET to GND .................................................... -7.0V to +0.3V Operating Temperature Range ...........................-40C to +85C SHDN to GND ............................................ (V - 0.3)V to +7.0V Junction Temperature......................................................+150C IN OUT to GND ...............................................(V - 0.3)V to +0.3V Storage Temperature Range ............................ -65C to +150C IN Output Short-Circuit Duration ........................................Indefinite Lead Temperature (soldering, 10s) ................................ +300C Continuous Power Dissipation (T = +70C) A 5-Pin SOT23 (derate 7.1mW/C above +70C)........... 571mW 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 (Circuit of Figure 2, V = V - 1V, V = V , T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) IN OUT SHDN IN A A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V -6.5 -2.5 V IN T = +25C, I = -100A -1 +1 A OUT Output Voltage Accuracy I = -100A, T = 0C to +85C-2 +2 % OUT A I = -100A to -200mA -3 +2 LOAD Circuit of Figure 3, T = +25C, I = -100A -1.2625 -1.25 -1.2375 A OUT Circuit of Figure 3, I = -100A, OUT SET Regulation Set Point -1.275 -1.225 V T = 0C to +85C A Circuit of Figure 3, I = -100A to -200mA -1.275 -1.2125 LOAD Maximum Output Current I -200 mA OUT Current Limit I V = 0 -1020 -515 -250 mA LIM OUT I = -100A -180 -85 OUT Ground-Pin Current I A Q I = -200mA -125 OUT I = -100mA 40 OUT Dropout Voltage (Note 2) mV I = -200mA 80 240 OUT Circuit of Figure 3, Line Regulation -0.15 0 +0.15 %/V V from -6.5V to -2.5V, V = -1.25V IN OUT Load Regulation I from 0mA to -200mA 0.004 %/mA OUT Output Voltage Noise 10Hz to 1MHz, C = 1F 160 V OUT RMS Power-Supply Rejection Ratio PSRR f = 100Hz 60 dB T = +25C -1 -0.001 A Shutdown Supply Current V = 0 A SHDN T = +85C-1 A Positive voltage at SHDN +1.6 SHDN Input High Threshold V (Note 3) Negative voltage at SHDN -1.6 Positive voltage at SHDN +0.4 SHDN Input Low Threshold V (Note 3) Negative voltage at SHDN -0.4 Set Input Bias Current I V = -1.25V, T = +25C -100 -15 nA SET SET A V = +6.5V 3.5 SHDN SHDN Input Bias Current T = +25C A A V = 0, -6.5V -0.5 +0.5 SHDN Thermal Shutdown Junction Hysteresis = 15C (typ) 160 C Temperature Note 1: Limits are 100% production tested at T = +25C. Limits over operating temperature range are guaranteed by design. A Note 2: The dropout voltage is defined as V - V , when V is 100mV above the nominal value of V . OUT IN OUT OUT Note 3: The SHDN logic input can be driven by either a positive voltage or a negative voltage. V < 0.4V puts the device in shutdown, SHDN while V > 1.6V enables the device. SHDN 2 MAX1735