AAT3242ITP-IP-T1

300mA/150mA Dual CMOS LDO Linear Regulator General Description The AAT3242 is a dual low dropout linear regulator with Power OK (POK) outputs. Two integrated regulators provide a high power 300mA output and a lower power 150mA output, making this device ideal for use with microprocessors and DSP cores in portable products. Two POK pins provide open drain output signals when their respective regulator output is within regulation. The AAT3242 has independent input voltage and enable pins for increased design flexibility. This device features a very low quiescent current (140µA typical) and low dropout voltages (typically 200mV and 400mV at the full output current level), making it ideal for portable applications where extended battery life is critical. The AAT3242 has complete over-current/short-circuit and over-temperature protection circuits to guard against extreme operating conditions. The AAT3242 is available in a space-saving, Pbfree, 12-pin TSOPJW package. This device is capable of operation over the -40°C to +85°C temperature range. AAT3242 Features • • • • • • • • • • • • PowerLinear™ High/Low Current Outputs, 300mA/150mA Low Dropout: — LDO A: 400mV at 300mA — LDO B: 200mV at 150mA High Output Voltage Accuracy: ±1.5% High PSRR: 65dB at 1kHz 70µA Quiescent Current for Each LDO Over-Current/Short-Circuit Protection Over-Temperature Protection Two POK Outputs Independent Power and Enable Inputs Uses Low Equivalent Series Resistance (ESR) Ceramic Capacitors 12-Pin TSOPJW Package -40°C to +85°C Temperature Range Applications • • • • • • • Cellular Phones Digital Cameras Handheld Instruments Microprocessor / DSP Core / I/O Power Notebook Computers PDAs and Handheld Computers Portable Communication Devices Typical Application VIN INA OUTA OUTPUT A 100kΩ POKA OUTPUT B 100kΩ POKB Enable B ENB GND POKB 2.2μF 2.2μF AAT3242 Enable A ENA POKA OUTB INB 3242.2006.04.1.10 1 300mA/150mA Dual CMOS LDO Linear Regulator Pin Descriptions Pin # 1 AAT3242 Symbol ENA Function Enable Regulator A pin; this pin should not be left floating. When pulled low, the PMOS pass transistor turns off and the device enters shutdown mode, consuming less than 1µA. Ground connection pins. Power OK pin with open drain output. It is pulled low when the OUTA pin is below the 10% regulation window. Low current (150mA) regulator output pin; should be decoupled with a 2.2µF or greater output low-ESR ceramic capacitor. Input voltage pin for Regulator B; should be decoupled with 1µF or greater capacitor. Enable Regulator B; this pin should not be left floating. When pulled low, the PMOS pass transistor turns off and the device enters shutdown mode, consuming less than 1µA. Power OK pin with open drain output. It is pulled low when the OUTB pin is below the 10% regulation window. High-current (300mA) regulator output pin; should be decoupled with a 2.2µF or greater output low-ESR ceramic capacitor. Input voltage pin for Regulator A; should be decoupled with 1µF or greater capacitor. 2, 3, 8, 9 4 5 6 7 GND POKA OUTB INB ENB 10 11 12 POKB OUTA INA Pin Configuration TSOPJW-12 (Top View) ENA GND GND POKA OUTB INB 1 2 3 4 5 6 12 11 10 9 8 7 INA OUTA POKB GND GND ENB 2 3242.2006.04.1.10 300mA/150mA Dual CMOS LDO Linear Regulator Absolute Maximum Ratings1 Symbol VIN VENIN(MAX) IOUT2 TJ TLEAD AAT3242 Description Input Voltage Maximum EN to Input Voltage DC Output Current Operating Junction Temperature Range Maximum Soldering Temperature (at leads, 10 sec) Value 6.0 0.3 PD/(VIN - VO) -40 to 150 300 Units V V mA °C °C Thermal Information Symbol θJA PD Description Thermal Resistance3 Maximum Power Dissipation (TA = 25°C)4 Value 110 909 Units °C/W mW 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Based on long-term current density limitation. 3. Mounted on an FR4 board. 4. Derate 9.1mW/°C above 25°C. 3242.2006.04.1.10 3 300mA/150mA Dual CMOS LDO Linear Regulator Electrical Characteristics1 VIN = VOUT(NOM) + 1.0V for VOUT options greater than 1.5V. VIN = 2.5V for VOUT ≤ 1.5V. IOUT = 1.0mA, COUT = 2.2µF, CIN = 1.0µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol VOUT VIN VDO ΔVOUT/ VOUT*ΔVIN ΔVOUT(Line) ΔVOUT(Load) VEN(L) VEN(H) VPOK VPOKHYS VPOK(LO) IPOK IOUT ISC IQ ISD PSRR TSD THYS eN TC AAT3242 Description Output Voltage Tolerance Input Voltage Dropout Voltage2, 3 Line Regulation4 Dynamic Line Regulation Dynamic Load Regulation Enable Threshold Low Enable Threshold High Power OK Trip Threshold Power OK Hysteresis Power OK Output Voltage Low POK Output Leakage Current Output Current Short-Circuit Current Ground Current Shutdown Current Power Supply Rejection Ratio Over-Temperature Shutdown Threshold Over-Temperature Shutdown Hysteresis Output Noise Output Voltage Temperature Coefficient Conditions IOUT = 1mA to 300mA TA = 25°C TA = -40 to 85°C Min -1.5 -2.5 VOUT + VDO5 Typ Max 1.5 2.5 5.5 600 0.09 Units % V mV %/V mV mV LDO A; IOUT = 300mA IOUT = 300mA VIN = VOUT + 1 to 5.0 V IOUT = 300mA, VIN = VOUT + 1 to VOUT + 2, TR/TF = 2µS IOUT = 1mA to 300mA, TR 1.2V VOUT < 0.4V VIN = 5V, No Load; EN A = VIN VIN = 5V, EN A = 0V 1kHz IOUT =1 0mA 10kHz 1MHz 94 1.0 98 0.4 1.0 300 600 70 65 45 42 145 12 125 1.0 V V % of VOUT % of VOUT V µA mA mA µA µA dB °C °C µVRMS ppm/°C eNBW = 300Hz to 50kHz 250 22 1. The AAT3242 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 2. VDO is defined as VIN - VOUT when VOUT is 98% of nominal. 3. For VOUT < 2.1V, VDO = 2.5 - VOUT. 4. CIN = 10µF. 5. To calculate minimum input voltage, use the following equation: VIN(MIN) = VOUT(MAX) + VDO(MAX) as long as VIN ≥ 2.5V. 4 3242.2006.04.1.10 300mA/150mA Dual CMOS LDO Linear Regulator Electrical Characteristics1 (continued) VIN = VOUT(NOM) + 1.0V for VOUT options greater than 1.5V. VIN = 2.5V for VOUT ≤ 1.5V. IOUT = 1.0mA, COUT = 2.2µF, CIN = 1.0µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol VOUT VIN VDO ΔVOUT/ VOUT*ΔVIN ΔVOUT(Line) ΔVOUT(Load) VEN(L) VEN(H) VPOK VPOKHYS VPOK(LO) IPOK IOUT ISC IQ PSRR TSD THYS eN TC AAT3242 Description Output Voltage Tolerance Input Voltage Dropout Voltage2, 3 Line Regulation4 Dynamic Line Regulation Dynamic Load Regulation Enable Threshold Low Enable Threshold High Power OK Trip Threshold Power OK Hysteresis Power OK Output Voltage Low POK Output Leakage Current Output Current Short-Circuit Current Ground Current Power Supply Rejection Ratio Over-Temperature Shutdown Threshold Over-Temperature Shutdown Hysteresis Output Noise Output Voltage Temperature Coefficient Conditions IOUT = 1mA to 150mA TA = 25°C TA = -40 to 85°C Min -1.5 -2.5 VOUT + VDO5 Typ Max 1.5 2.5 5.5 300 0.09 Units % V mV %/V mV mV V V % of VOUT % of VOUT V µA mA mA µA dB °C °C µVRMS ppm/°C LDO B; IOUT = 150mA IOUT = 150mA VIN = VOUT + 1 to 5.0 V IOUT = 150mA, VIN = VOUT + 1 to VOUT + 2, TR/TF = 2µS IOUT = 1mA to 150mA, TR 1.2V VOUT < 0.4V VIN = 5V, No Load; EN B = VIN 1kHz IOUT = 10mA 10kHz 1MHz 94 1.0 98 0.4 1.0 150 600 70 65 45 42 145 12 125 eNBW = 300Hz to 50kHz 250 22 1. The AAT3242 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 2. VDO is defined as VIN - VOUT when VOUT is 98% of nominal. 3. For VOUT < 2.3V, VDO = 2.5 - VOUT. 4. CIN = 10µF. 5. To calculate minimum input voltage, use the following equation: VIN(MIN) = VOUT(MAX) + VDO(MAX) as long as VIN ≥ 2.5V. 3242.2006.04.1.10 5 300mA/150mA Dual CMOS LDO Linear Regulator Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. AAT3242 Dropout Voltage vs. Temperature 3.20 Dropout Characteristics 540 Dropout Voltage (mV) 420 360 300 240 180 120 60 0 -40 -30 -20 -10 0 Output Voltage (V) 480 IL = 300mA 3.00 2.80 2.60 2.40 2.20 2.00 2.70 IOUT = 0mA IL = 150mA IL = 100mA IOUT = 300mA IOUT = 150mA IOUT = 10mA 2.80 IOUT = 100mA IOUT = 50mA IL = 50mA 10 20 30 40 50 60 70 80 90 100 110 120 2.90 3.00 3.10 3.20 3.30 Temperature (°C) Input Voltage (V) Dropout Voltage vs. Output Current 500 90 80 70 60 50 40 30 20 10 0 0 50 100 150 200 250 300 2 Ground Current vs. Input Voltage Dropout Voltage (mV) 400 350 300 250 200 150 100 50 0 Ground Current (μA) 450 85°C 25°C -40°C IOUT = 300mA IOUT = 0mA IOUT = 150mA IOUT = 50mA IOUT = 10mA 2.5 3 3.5 4 4.5 5 Output Current (mA) Input Voltage (V) Quiescent Current vs. Temperature 100 Output Voltage vs. Temperature 1.203 1.202 Quiescent Current (μA) 90 Output Voltage (V) -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 80 70 60 50 40 30 20 10 0 1.201 1.200 1.199 1.198 1.197 1.196 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Temperature (°C) 6 3242.2006.04.1.10 300mA/150mA Dual CMOS LDO Linear Regulator Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. AAT3242 Turn-On Time and POK Delay Line Transient Response VENABLE (2V/div) Input Voltage (V) 6 5 3.25 VIN 3.20 Output Voltage (V) VOUT (500mV/div) VPOK (500mV/div) 4 3 2 1 0 -1 3.15 3.10 3.05 3.00 VOUT 2.95 2.90 2.85 Time (10μs/div) -2 Time (100μs/div) Load Transient Response 2.90 2.85 2.80 2.75 2.70 2.65 2.60 500 400 300 200 100 3.00 Load Transient Response 300mA 800 700 Output Voltage (V) 2.90 2.80 2.70 2.60 2.50 2.40 2.30 2.20 2.10 Output Current (mA) Output Current (mA) Output Voltage (V) VOUT VOUT 600 500 400 300 200 IOUT 0 -100 IOUT 100 0 -100 Time (100μs/div) Time (10μs/div) POK Output Response VIN (2V/div) 1200 Over-Current Protection 1000 800 600 400 200 0 -200 VOUT (2V/div) VPOK (1V/div) Output Current (mA) Time (200μs/div) Time (20ms/div) 3242.2006.04.1.10 7 300mA/150mA Dual CMOS LDO Linear Regulator Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. AAT3242 Self Noise Noise Amplitude (μV/rtHz) 10 1.250 1.225 1.200 1 VEN(H) and V EN(L) vs. VIN VEN (V) 1.175 1.150 1.125 1.100 1.075 VEN(H) 0.1 VEN(L) 0.01 0.01 0.1 1 10 100 1000 1.050 2.5 3.0 3.5 4.0 4.5 5.0 5. Frequency (kHz) Input Voltage (V) 8 3242.2006.04.1.10 300mA/150mA Dual CMOS LDO Linear Regulator Functional Block Diagram AAT3242 INA Over-Current Protection Over Temperature Protection Voltage Reference + OUTA ENA + Error Amplifier - POK A 91% VREF INB Over-Current Protection Over Temperature Protection + Error Amplifier + OUTB POKB ENB Voltage Reference 91% VREF GND Functional Description The AAT3242 is a high performance dual LDO regulator with two Power OK pins. The first regulator (A) sources 300mA of current, while the second (B) regulator can deliver 150mA. Each regulator has an integrated Power OK comparator which indicates when the respective output is out of regulation. The POK pins are open drain outputs, and they are held low when the respective regulator is in shutdown mode. The device has independent enable pins to shut down each LDO regulator for power conservation in portable products. Forcing EN A/B low (