MAX8875EUK33-T

19-1556; Rev 1; 12/00 150mA, Low-Dropout Linear Regulator with Power-OK Output The MAX8875 is optimized for use with a 1µF ceramic output capacitor. For a pin-compatible, functionally equivalent device for use with a higher ESR output capacitor, see the MAX8885 data sheet. Features ♦ Power-OK Output ♦ Small Output Capacitor (1µF ceramic) ♦ Preset Output Voltages (±1% accuracy) ♦ Guaranteed 150mA Output Current ♦ 85µA No-Load Supply Current ♦ Low 110mV Dropout at 100mA Load (165mV at 150mA load) ♦ Thermal-Overload and Short-Circuit Protection ♦ Reverse-Battery Protection ♦ 60dB PSRR at 100Hz ♦ 1µA max Shutdown Current Ordering Information PART* TEMP. RANGE PIN-PACKAGE MAX8875EUKxy-T -40°C to +85°C 5 SOT23-5 *xy is the output voltage code (see Output Voltage Selector Guide). Applications Output Voltage Selector Guide PCS Telephones Hand-Held Instruments Cellular Telephones Palmtop Computers MAX8875EUK15-T 1.5 ADQI Cordless Telephones Electronic Planners MAX8875EUK25-T 2.5 ADKZ PCMCIA Cards Modems MAX8875EUK27-T MAX8875EUK30-T MAX8875EUK33-T 2.7 3.0 3.3 ADLA ADLB ADLC MAX8875EUK50-T 5.0 ADLD Typical Operating Circuit VOUT (V) OUT COUT 1µF CIN 1µF TOP MARK Note: Other output voltages between 1.5V and 5.0V are available in 100mV increments—contact the factory for information. Minimum order quantity is 25,000 units. OUTPUT PRESET 1.5V TO 5.0V 150mA INPUT +2.5V TO +6.5V IN PART Pin Configuration TOP VIEW IN 1 5 OUT 4 POK MAX8875 100k GND 2 ON OFF POK SHDN GND MAX8875 TO µC SHDN 3 SOT23-5 ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX8875 General Description The MAX8875 low-dropout linear regulator operates from a +2.5V to +6.5V input range and delivers up to 150mA. A P-channel MOSFET pass transistor allows its 85µA supply current to remain independent of the load, making this device ideal for battery-operated portable equipment such as PCS phones, cellular phones, cordless phones, and modems. The MAX8875 features a power-OK (POK) output that indicates when the output is out of regulation. The device is available in several preset output voltage versions: 5.0V, 3.3V, 3.0V, 2.7V, 2.5V, or 1.5V. Other features include 1µA (max) shutdown current, short-circuit protection, thermal shutdown protection, and reverse-battery protection. The device comes in a miniature 5-pin SOT23 package. MAX8875 150mA, Low-Dropout Linear Regulator with Power-OK Output ABSOLUTE MAXIMUM RATINGS IN, SHDN, POK to GND...............................................-7V to +7V SHDN to IN ...............................................................-7V to +0.3V OUT to GND ................................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C θJA ...............................................................................+140°C/W Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 = VOUT(NOMINAL) + 1V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Input Voltage SYMBOL CONDITIONS VIN TA = -40°C to +85°C MAX UNITS 2.5 6.5 V -1.0 1.0 -2 2 IOUT = 100µA to 120mA -3 2 Maximum Output Current IOUT 150 Current Limit ILIM 160 Ground Pin Current Dropout Voltage (Note 2) IQ VIN - VOUT TYP IOUT = 100µA TA = +25°C, IOUT = 100µA Output Voltage Accuracy MIN % mA 390 IOUT = 100µA 85 IOUT = 150mA 100 IOUT = 100µA 0.1 IOUT = 50mA 50 IOUT = 100mA 110 IOUT = 150mA 165 mA 180 220 µA mV Line Regulation ∆VLNR VIN = 2.5V or (VOUT + 0.1V) to 6.5V, IOUT = 1mA Load Regulation ∆VLDR IOUT = 100µA to 120mA, COUT = 1µF 0.01 %/mA COUT = 10µF, f = 10Hz to 100kHz 170 µVRMS f = 100Hz 60 dB Output Voltage Noise Output Voltage AC PowerSupply Rejection Ratio PSRR -0.15 0 0.15 %/V SHUTDOWN Shutdown Supply Current SHDN Input Threshold SHDN Input Bias Current 2 IOFF VIH VIL ISHDN SHDN = GND TA = +25°C 0.005 TA = +85°C 0.02 2.0 VIN = 2.5V to 5.5V SHDN = IN or GND 1 0.4 TA = +25°C 0 TA = +85°C 0.05 _______________________________________________________________________________________ 100 µA V nA 150mA, Low-Dropout Linear Regulator with Power-OK Output (VIN = VOUT(NOMINAL) + 1V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX -3 -5 -8 TA = 0°C to +85°C -8.5 -10.5 -13.5 TA = -40°C to +85°C -7 UNITS POWER-OK OUTPUT 1 - VOUT / VOUT(NOMINAL) 100, IOUT = 0, VOUT falling, VOUT ≥ 2.5V Power-OK Voltage Threshold VPOK 1 - VOUT /VOUT(NOMINAL) 100, IOUT = ILIM, VOUT falling, VOUT < 2.5V % In dropout, VOUT falling, VOUT ≥ 2.5V -5.3 1 Hysteresis, IOUT = 0 POK Output Voltage Low VOL -15 ISINK = 1mA 0 ≤ VPOK ≤ 6.5V, VOUT in regulation POK Output Leakage Current 0.4 V 1 µA THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis TSHDN 170 °C ∆TSHDN 20 °C Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. Note 2: Dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V. Applies only for output voltages ≥ 2.5V. Typical Operating Characteristics (MAX8875EUK30, VIN = +3.6V, CIN = COUT = 1µF, SHDN = IN, TA = +25°C, unless otherwise noted.) GROUND PIN CURRENT vs. OUTPUT LOAD GROUND PIN CURRENT (µA) 80 IOUT = 0 60 40 110 VIN = 5.0V 105 100 VIN = 3.5V 95 90 20 0 1 2 3 4 INPUT VOLTAGE (V) 5 6 VIN = VOUT(NOMINAL) + 0.5V 115 VOUT = 5.0V MAX8875EUK50 110 105 100 VOUT = 3.0V MAX8875EUK30 95 90 85 0 120 MAX8875toc03 100 115 MAX8875toc02 IOUT = 150mA GROUND PIN CURRENT (µA) MAX8875toc01 120 GROUND PIN CURRENT vs. OUTPUT LOAD GROUND PIN CURRENT (µA) GROUND PIN CURRENT vs. INPUT VOLTAGE 85 0 15 30 45 60 75 90 105 120 135 150 OUTPUT LOAD (mA) 0 15 30 45 60 75 90 105 120 135 150 OUTPUT LOAD (mA) _______________________________________________________________________________________ 3 MAX8875 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (MAX8875EUK30, VIN = +3.6V, CIN = COUT = 1µF, SHDN = IN, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. INPUT VOLTAGE VIN = 3.6V IOUT = 150mA 90 VIN = 3.6V OR 5.0V IOUT = 0 80 2.5 2.0 IOUT = 150mA 1.5 1.0 3.05 3.00 VIN = 3.6V 2.95 VIN = 5.0V 0.5 70 2.90 0 60 -40 -15 10 35 60 0 85 1 2 3 4 5 0 6 15 30 45 60 75 90 105 120 135 150 TEMPERATURE (°C) INPUT VOLTAGE (V) OUTPUT LOAD (mA) OUTPUT VOLTAGE vs. TEMPERATURE DROPOUT VOLTAGE vs. OUTPUT LOAD POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 3.00 VIN = 3.6V IOUT = 150mA 2.95 2.90 COUT = 10µF TA = +85°C TA = +25°C 100 -15 10 35 60 40 30 COUT = 1µF 20 TA = -40°C 10 0 85 0 15 0 0.01 30 45 60 75 90 105 120 135 150 0.1 1 10 FREQUENCY (kHz) OUTPUT NOISE SPECTRAL DENSITY vs. FREQUENCY OUTPUT NOISE LINE-TRANSIENT RESPONSE f = 10Hz TO 100kHz COUT = 10µF IOUT = 50mA VIN MAX8875toc10 COUT = 10µF IOUT = 50mA 5V 4V 1 VOUT 500µV/div 3.02V VOUT 0.1 3.00V 2.98V 0.01 1 10 FREQUENCY (kHz) 4 100 1000 MAX8875toc13 OUTPUT LOAD (mA) 10 0.1 100 TEMPERATURE (°C) MAX8875toc11 -40 60 50 150 50 VIN = 5.0V IOUT = 150mA MAX8875toc09 200 PSRR (dB) 3.05 DROPOUT VOLTAGE (mV) VIN = 3.6V OR 5.0V IOUT = 0 70 MAX8875toc08 250 MAX8875toc07 3.10 OUTPUT VOLTAGE (V) IOUT = 0 OUTPUT VOLTAGE (V) 110 100 3.0 3.10 MAX8875toc05 VIN = 5.0V IOUT = 150mA OUTPUT VOLTAGE (V) GROUND PIN CURRENT (µA) 120 OUTPUT VOLTAGE vs. OUTPUT LOAD 3.5 MAX8875toc04 130 MAX8875toc06 GROUND PIN CURRENT vs. TEMPERATURE OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz) MAX8875 150mA, Low-Dropout Linear Regulator with Power-OK Output 10ms/div 10µs/div IOUT = 50mA _______________________________________________________________________________________ 150mA, Low-Dropout Linear Regulator with Power-OK Output MAX8875toc14 3.01V VOUT 3.00V 3.00V 2.99V 50mA 50mA ILOAD 2.99V ILOAD 0 0 10µs/div 10µs/div VIN = VOUT + 0.5V, IOUT = 0 TO 50mA VIN = VOUT + 0.1V, IOUT = 0 TO 50mA SHUTDOWN DELAY 3V MAX8875toc17 MAX8875toc16 POK OUTPUT VOUT 1V/div 0 0 0 2V VOUT 2V/div VPOK 2V/div 4V VSHDN 1V/div 0 VIN 1V/div 3V 2V 100µs/div 200µs/div MAX8875EUK30, ROUT = 60Ω RPOK = 100kΩ POK STARTUP RESPONSE POK AND SHUTDOWN RESPONSE MAX8875toc18 5.0V VIN 2.5V/div 0 MAX8875toc19 VOUT 3.01V MAX8875toc15 LOAD-TRANSIENT RESPONSE NEAR DROPOUT LOAD-TRANSIENT RESPONSE 2V VSHDN 2V/div 0 VOUT 2.5V/div 2.5V 0 2V VOUT 2V/div 0 4V 5.0V VPOK 2V/div VPOK 2.5V/div 0 0 RLOAD = 60Ω 10ms/div RPOK = 100kΩ 10µs/div RPOK = 100kΩ _______________________________________________________________________________________ 5 MAX8875 Typical Operating Characteristics (continued) (MAX8875EUK30, VIN = +3.6V, CIN = COUT = 1µF, SHDN = IN, TA = +25°C, unless otherwise noted.) 150mA, Low-Dropout Linear Regulator with Power-OK Output MAX8875 Pin Description PIN NAME FUNCTION 1 IN 2 GND Ground. This pin also functions as a heatsink. Solder to a large pad or the circuit-board ground plane to maximize power dissipation. 3 SHDN Active-Low Shutdown Input. A logic low reduces the supply current to below 1µA. Connect to IN for normal operation. 4 POK Power-OK Output. Active-low, open-drain output indicates an out-of-regulation condition. Connect a 100k pull-up resistor to OUT for logic levels. If not used, leave this pin unconnected. 5 OUT Regulator Output. Fixed 5.0V, 3.3V, 3.0V, 2.7V, 2.5V, or 1.5V output. Sources up to 150mA. Bypass with 1µF (