19-2733; Rev 0; 1/03 KIT ATION EVALU E L B AVAILA Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP Features ♦ Guaranteed 200mA Output Current ♦ Low 100mV (typ) Dropout at 100mA ♦ Low 40µVRMS Output Noise ♦ Low 80µA Operating Supply Current ♦ 62dB PSRR ♦ <1µA Shutdown Current ♦ Thermal-Overload and Short-Circuit Protection ♦ Output Current Limit ♦ Tiny 1.16mm x 1.57mm x 0.66mm UCSP (3 x 2 Grid) Ordering Information Applications Cellular and Cordless Phones PART PDAs and Palmtop Computers TEMP RANGE OUT VOLTAGE PINPACKAGE -40°C to +85°C 1.5V to 3.3V 6 UCSP Notebook Computers MAX8532EBT_* Digital Cameras *“_” = Output voltage code (see the Output Voltage Selector Guide). PCMCIA Cards Wireless LAN Cards Output Voltage Selector Guide Hand-Held Instruments VOUT (V) TOP MARK MAX8532EBTJ PART 2.85 ACP MAX8532EBTG 3 ACU Note: Contact the factory for other output voltages between 1.5V and 3.3V. The minimum order quantity is 25,000 units. Pin Configuration Typical Operating Circuit TOP VIEW INPUT 2.5V TO 6.5V CIN 2.2µF IN OUT OUTPUT 1.5V TO 3.3V AT 200mA 2.2µF GND SHDN BP A1 A2 A3 MAX8532EBT MAX8532 ON SHDN BP OFF 10nF GND B1 B2 B3 OUT IN N.C. UCSP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX8532 General Description The MAX8532 offers the benefits of low-dropout voltage and ultra-low power regulation in a subminiaturized UCSP, making it ideal for space-restricted portable equipment. The device operates from a 2.5V to 6.5V input and delivers up to 200mA, with low dropout of 100mV (typ) at 100mA. Designed with an internal P-channel MOSFET pass transistor, the supply current is kept at a low 80µA, independent of the load current and dropout voltage. Other features include short-circuit protection and thermal-shutdown protection. The MAX8532 includes a reference bypass pin for low output noise (40µVRMS) and a logic-controlled shutdown input. The device is available in a tiny 6-pin UCSP. MAX8532 Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP ABSOLUTE MAXIMUM RATINGS IN, SHDN, BP to GND ..............................................-0.3V to +7V OUT to GND ................................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration ........................................Indefinite Continuous Power Dissipation (TA = +70°C) 6-Pin UCSP (derate 3.9mW/°C above +70°C) ..............308mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C 6-Pin UCSP Solder Profile ............................................(Note 1) Note 1: For UCSP solder profile information, visit www.maxim-ic.com/1st_pages/UCSP.html. 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 (IN = 3.8V, SHDN = IN, CBP = 10nF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Input Voltage Undervoltage Lockout Threshold SYMBOL CONDITIONS MIN VIN VUVLO Output Voltage Accuracy IN rising, hysteresis is 40mV (typ) 2.15 +1 +2 TA = -40°C to +85°C, IOUT = 0.1mA to 200mA -3 +3 200 210 VOUT - VIN ∆VLNR Output Voltage Noise Ripple Rejection PSRR V -2 ILIM Line Regulation V 2.42 -1 IOUT Dropout Voltage UNITS 6.5 TA = -40°C to +85°C, IOUT = 1mA Current Limit IQ 2.25 MAX TA = +25°C, IOUT = 1mA Maximum Output Current Ground Current TYP 2.5 mA 330 550 No load 80 150 IOUT = 100mA 100 IOUT = 100mA (Note 3) 100 IN = (OUT + 0.1V) to 3.8V % -0.2 mA µA 200 mV +0.2 %/V 10Hz to 100kHz, COUT = 10µF, IOUT = 10mA 40 µVRMS 100Hz, IOUT = 30mA 62 dB SHUTDOWN SHDN Supply Current SHDN Input Threshold SHDN Input Bias Current IOFF SHDN = 0, TA = +25°C 0.01 SHDN = 0, TA = +85°C 0.1 VIH Input high voltage VIL Input low voltage ISHDN SHDN = IN or GND TSHDN TJ rising 1 1.6 0.4 TA = +25°C 0.7 TA = +85°C 0.8 100 µA V nA THERMAL PROTECTION Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis ∆TSHDN 160 °C 10 °C Note 2: All units are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. Note 3: The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V. Specification applies only when VOUT > = 2.5V. 2 _______________________________________________________________________________________ Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP SUPPLY CURRENT vs. LOAD CURRENT NO LOAD 40 80 60 40 2 3 4 5 6 60 40 10 20 30 40 50 60 70 -40 80 -15 10 35 60 SUPPLY VOLTAGE (V) LOAD CURRENT (mA) TEMPERATURE (°C) DROPOUT VOLTAGE vs. LOAD CURRENT LDO DROPOUT VOLTAGE vs. VOUT OUTPUT VOLTAGE ACCURACY vs. TEMPERATURE 100 DROPOUT VOLTAGE (mV) 200 150 100 50 80 IOUT = 80mA 60 40 0.4 0.2 0 -0.2 -0.6 0 2.5 20 40 60 80 100 120 140 160 180 200 0.6 -0.4 20 0 2.6 2.7 2.8 2.9 3.0 3.1 3.2 -40 3.3 -15 10 35 60 VOUT (V) TEMPERATURE (°C) PSRR vs. FREQUENCY OUTPUT NOISE SPECTRAL DENSITY vs. FREQUENCY OUTPUT NOISE (10Hz TO 100kHz) 50 40 30 20 MAX8532 toc08 60 85 MAX8532 toc09 10000 NOISE DENSITY (nVRMS/√Hz) 100Ω LOAD MAX8532 toc07 LOAD CURRENT (mA) 70 85 MAX8532 toc06 120 MAX8532 toc04 250 0 80 0 0 OUTPUT VOLTAGE (%) 1 MAX8532 toc05 0 100 20 0 0 DROPOUT VOLTAGE (mV) 100 20 20 PSRR (dB) 120 SUPPLY CURRENT (µA) 80 60 120 SUPPLY CURRENT (µA) 80mA LOAD 100 140 MAX8532 toc02 120 SUPPLY CURRENT (µA) 140 MAX8532 toc01 140 SUPPLY CURRENT vs. TEMPERATURE MAX8532 toc03 SUPPLY CURRENT vs. SUPPLY VOLTAGE 1000 VOUT 500µV/div 100 10 10 0 0.01 0.1 1 10 FREQUENCY (kHz) 100 1000 MAX8532 Typical Operating Characteristics (VOUT = 2.85V, load = 80mA, VIN = 3.8V, COUT = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF. TA = +25°C, unless otherwise noted.) 0.01 0.1 1 10 100 1ms/div FREQUENCY (kHz) _______________________________________________________________________________________ 3 MAX8532 Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP Typical Operating Characteristics (continued) (VOUT = 2.85V, load = 80mA, VIN = 3.8V, COUT = 2.2µF, CBP = 0.01µF, and CIN = 2.2µF. TA = +25°C, unless otherwise noted.) LINE TRANSIENT LOAD TRANSIENT VIN = 3.35V, ILOAD = 1mA TO 80mA MAX8532 toc10 MAX8532 toc11 4.5V VIN 3.5V 20mV/div AC-COUPLED VOUT 1V/div 20mV/div AC-COUPLED VOUT 50mA/div ILOAD 0 40µs/div 10µs/div LOAD TRANSIENT NEAR DROPOUT SHUTDOWN RESPONSE MAX8532 toc13 MAX8532 toc12 20mV/div AC-COUPLED VOUT 2V/div VOUT 0 VIN = VOUT + 0.1V 1V/div 50mA/div VSHDN ILOAD 0 0 1ms/div 10µs/div Pin Description 4 PIN NAME B3 N.C. Not Connected FUNCTION B2 IN Regulator Input B1 OUT Regulator Output. Guaranteed 200mA output current. A1 GND Ground A2 SHDN A3 BP Shutdown Input. A logic low shuts down the regulator. Connect to IN for normal operation. Reference Noise Bypass. Bypass with a 0.01µF ceramic capacitor for reduced noise. _______________________________________________________________________________________ Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP IN SHDN SHUTDOWN AND POWER-ON CONTROL MOS DRIVER WITH ILIMIT ERROR AMP OUT MAX8532 THERMAL SENSOR 1.25V REF GND BP Detailed Description The MAX8532 is a low-power, low-dropout, low-quiescent current linear regulator designed primarily for battery-powered applications. For preset output voltages, see the Output Voltage Selector Guide. The device supplies up to 200mA for OUT. The MAX8532 consists of a 1.25V reference, error amplifier, P-channel pass transistor, reference bypass block, and internal feedback voltage divider. The 1.25V bandgap reference is connected to the error amplifier’s inverting input. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, allowing more current to pass to the output and increasing the output voltage. If the feedback voltage is high, the pass-transistor gate is pulled up, allowing less current to pass to the output. The output voltage is fed back through an internal resistor voltage-divider connected to the OUT pin. Shutdown The MAX8532 has a single shutdown control input (SHDN). Drive SHDN low to shut down the output, reducing supply current to 10nA. Connect SHDN to a logic-high, or IN, for normal operation. Internal P-Channel Pass Transistor The MAX8532 features a 1Ω P-channel MOSFET pass transistor. A P-channel MOSFET provides several advantages over similar designs using PNP pass transistors, including longer battery life. It requires no base drive, reducing quiescent current. PNP-based regulators waste considerable current in dropout when the pass transistor saturates and also use high base-drive currents under heavy loads. The MAX8532 does not suffer these problems and consumes only 90µA quiecent current whether in dropout, light-load, or heavy-load applications (see the Typical Operating Characteristics). Whereas a PNPbased regulator has dropout voltage independent of the load, a P-channel MOSFET’s dropout voltage is proportional to load current, providing for low dropout voltage at heavy loads and extremely low dropout voltage at lighter loads. _______________________________________________________________________________________ 5 MAX8532 Functional Diagram MAX8532 Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP Current Limit Low-Noise Operation The MAX8532 contains an independent current limiter, which monitors and controls the pass transistor’s gate voltage, limiting the output current to 210mA (min). The output can be shorted to ground indefinitely without damaging the part. An external 0.01µF bypass capacitor at BP, in conjunction with an internal resistor, creates a lowpass filter. The MAX8532 exhibits 40µVRMS output voltage noise with CBP = 0.01µF and COUT = 2.2µF (see the Output Noise Spectral Density vs. Frequency graph in the Typical Operating Characteristics). Thermal-Overload Protection Thermal-overload protection limits total power dissipation in the MAX8532. When the junction temperature exceeds TJ = +160°C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor turns the pass transistor on again after the IC’s junction temperature cools by 10°C, resulting in a pulsed output during continuous thermal-overload conditions. Thermal-overload protection is designed to protect the MAX8532 in the event of fault conditions. For continual operation, do not exceed the absolute maximum junction temperature rating of TJ = +150°C. Operating Region and Power Dissipation The MAX8532’s maximum power dissipation depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the airflow rate. The power dissipation across the device is P = I OUT (V IN - V OUT ). Maximum power dissipation: PMAX = (TJ - TA)/(θJB + θBA) where TJ - TA is the temperature difference between the MAX8532 die junction and the surrounding air, θJB (or θJC) is the thermal resistance of the package, and θBA is the thermal resistance through the printed circuit board, copper traces, and other materials, to the surrounding air. Applications Information Capacitor Selection and Regulator Stability Use a 2.2µF capacitor on the MAX8532’s input. Larger input capacitor values with lower ESR provide better supply-noise rejection and line-transient response. To reduce noise and improve load transients, use large output capacitors up to 10µF. For stable operation over the full temperature range and with rated maximum load currents, use a minimum of 2.2µF (or 1µF for <150mA loading) for OUT. Note that some ceramic dielectrics exhibit large capacitance and ESR variation with temperature. With dielectrics such as Z5U and Y5V, use 4.7µF or more to ensure stability at temperatures below -10°C. With X7R or X5R dielectrics, 2.2µF is sufficient at all operating temperatures. These regulators are optimized for ceramic capacitors. Tantalum capacitors are not recommended. PSRR and Operation from Sources Other than Batteries The MAX8532 is designed to deliver low dropout voltages and low quiescent currents in battery-powered systems. Power-supply rejection is 62dB at low frequencies (see the Power-Supply Rejection Ratio vs. Frequency graph in the Typical Operating Characteristics). When operating from sources other than batteries, improve supply-noise rejection and transient response by increasing the values of the input and output bypass capacitors and through passive filtering techniques. 6 _______________________________________________________________________________________ Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP Input/Output (Dropout Voltage) A regulator’s minimum input/output voltage differential (or dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the MAX8532 uses a P-channel MOSFET pass transistor, its dropout voltage is a function of drain-to-source onresistance (RDS(ON)) multiplied by the load current (see the Typical Operating Characteristics). Calculating the Maximum Output Power in UCSP The maximum output power of the MAX8532 can be limited by the maximum power dissipation of the package. Ascertain the maximum power dissipation by calculating the power dissipation of the package as a function of the input voltage, output voltage, and output current. The maximum power dissipation should not exceed the package’s maximum power rating: P = (VIN(MAX) - VOUT) x IOUT where: VIN(MAX) = Maximum input voltage PMAX = Maximum power dissipation of the package (308mW for UCSP) VOUT = Output voltage of OUT IOUT = Maximum output current of OUT P should be less than PMAX. Chip Information TRANSISTOR COUNT: 1320 PROCESS: BiCMOS _______________________________________________________________________________________ 7 MAX8532 Load-Transient Considerations The MAX8532 load-transient response graphs (see the Typical Operating Characteristics) show two components of the output response: a DC shift in the output voltage due to the different load currents, and the transient response. Increase the output capacitor’s value and decrease its ESR to attenuate transient spikes. Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6L, UCSP.EPS MAX8532 Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.