MAX25301AATB/V+

Click here to ask about the production status of specific part numbers. MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator General Description Benefits and Features The MAX25301A/B are low-noise automotive linear regulators that deliver up to 1A of output current with only 7µVRMS of output noise from 10Hz to 100kHz. ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● These regulators maintain ±1% output accuracy over a wide input-voltage range, requiring only 100mV of inputto-output headroom at full load. The 1200µA no-load supply current is independent of dropout voltage. The MAX25301A has nine pin-selectable output voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX25301B output voltage can be adjusted to a value in the range of 0.6V to 5.3V using two external resistors. The MAX25301B also includes an active-high POK signal for trouble-free load startup. All versions include a programmable output soft-start rate as well as output-overcurrent and thermal-overload protection. The MAX25301A/B are offered in a 10-pin TDFN (3mm x 3mm) package. Applications ● Automotive Electronics ● Audio Systems ● High-Resolution Data Acquisition Systems 19-100783; Rev 0; 6/20 1.7V to 5.5V Input Voltage Range 0.6V to 5.3V Programmable Output Voltage 7µVRMS Output Noise, 10Hz to 100kHz 1200µA Operating Supply Current 70dB PSRR at 10kHz 1A Maximum Output Current ±1% DC Accuracy Over Load, Line, and Temperature 100mV Maximum Dropout at 1A Load VOUT + 0.1V Output Capacitance COUT For stability and proper operation IQ Supply Current MIN Guaranteed by output accuracy 4 IOUT = 0mA 1.6 MAX UNITS 5.5 V 1.7 V 5.3 10 1200 2000 0.01 0.1 TJ = +125°C 0.1 VEN = 0V Output Accuracy (MAX25301A Only) ACC25301A IOUT from 0.1mA to 1A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V -1.0 Output Accuracy (MAX25301B Only) ACC25301B IOUT from 0.1mA to 1A, VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V 0.594 Load Regulation IOUT from 0.1mA to 1A Load Transient IOUT = 50mA to 1A to 50mA, tRISE = tFALL = 1µs 19-100783 0.6 V µF TJ = +25°C ISHUTDOWN www.maximintegrated.com TYP µA μA 1.0 % 0.606 V 0.02 %/V 50 mV Maxim Integrated | 5 MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator Electrical Characteristics (continued) (VIN = 3.6V, TJ = -40°C to +125°C, CBYP = 0.047μF, CIN = 10µF, COUT = 10µF, IOUT = 100mA, unless otherwise specified. Note 1.) PARAMETER SYMBOL CONDITIONS Line Regulation VIN from VOUT + 0.3V to 5.5V, VIN > 1.7V Line Transient VIN = 4V to 5V to 4V, IOUT = 1A, tRISE = tFALL = 5µs Dropout Voltage (Note 2) IOUT = 1A Current Limit VOUT = 95% of regulation Output Noise IOUT = 100mA, f = 10Hz to 100kHz MIN %/V 3 mV 50 100 80 160 150 300 1.4 1.6 1.15 CBYP = 47nF 7 f = 1kHz 70 f = 10kHz 70 f = 100kHz 60 PSRR IOUT = 100mA BYP Capacitor Range CBYP Regulator remains stable f = 1MHz VIN from 1.7V to 5.5V EN falling 0.4 0.7 EN Input Leakage Current VEN from 1.7V to 5.5V TJ = +25°C -1 0.001 POK Threshold (MAX25301B Only) VOUT when POK switches VOUT rising POK Voltage, Low (MAX25301B Only) IPOK = 1mA POK Leakage Current (MAX25301B Only) VPOK = 5.5V SELA/B Input Capacitance (MAX25301A Only) CINSELA/B dB 50 EN Input Threshold 0.8 TJ = +125°C 88 91 +1 94 88 -0.1 TJ = +125°C 10 100 0.001 +0.1 0.01 When shorted to GND or IN 500 1 10 VOUT = 3.6V, when VIN falls to 0V Thermal Shutdown Threshold TJ when output turns on/off V µA % mV µA Ω MΩ When Hi-Z Input Reverse-Current Threshold µF µA 1.2 0.01 VOUT falling When Hi-Z A µVRMS 0.1 EN rising RINSELA/B mV 40 0.001 From BYP to GND during startup TJ = +25°C UNITS 0.05 VIN = 2.5V (Note 3) Power Supply Rejection Ratio SELA/B Input Resistance (MAX25301A Only) MAX VIN = 3.6V VIN = 1.7V BYP Soft-Start Current TYP 400 TJ rising 165 TJ falling 150 pF mA °C Note 1: Limits over the specified operating temperature and supply voltage range are guaranteed by design and characterization, and production tested at room temperature only. Note 2: Dropout voltage is defined as (VIN - VOUT), when VIN = VOUT(NOMINAL) - 0.1V. For VOUT(NOMINAL) less than 1.7V, dropout voltage is not guaranteed. Note 3: Guaranteed by design and characterization. www.maximintegrated.com 19-100783 Maxim Integrated | 6 MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator Typical Operating Characteristics (MAX25301B, VIN = 5.0V, VOUT = 3.3V, TA = 25°C, CIN = 10µF , COUT = 10µF, unless otherwise noted.) www.maximintegrated.com 19-100783 Maxim Integrated | 7 MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator Pin Configurations MAX25301A TOP VIEW (PAD-SIDE DOWN) IN 1 10 OUT IN 2 9 OUT EXPOSED PAD GND 3 8 BYP EN 4 7 OUTS SELA 5 6 SELB 10-PIN TDFN 3mm x 3mm www.maximintegrated.com 19-100783 Maxim Integrated | 8 MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator MAX25301B TOP VIEW (PAD-SIDE DOWN) IN 1 10 OUT IN 2 9 OUT EXPOSED PAD GND 3 8 BYP EN 4 7 FB GS 5 6 POK 10-PIN TDFN 3mm x 3mm Pin Description PIN NAME FUNCTION 1, 2 IN Regulator Supply Input. Connect to a voltage between 1.7V and 5.5V and bypass with a 10µF capacitor from IN to GND. 3 3 GND Regulator Ground. Connect IN and OUT bypass capacitor GND connections to this pin for best performance. 4 4 EN Enable Input. Connect this pin to a logic signal to enable (VEN high) or disable (VEN low) the regulator output. Connect to IN to keep the output enabled whenever a valid supply voltage is present. 5 --- SELA Select Input A. Connect to GND, IN, or leave unconnected to select the output voltage. This pin is read only at startup. --- 5 GS 6 --- SELB Select Input B. Connect to GND, IN, or leave unconnected to select the output voltage. This pin is read only at startup. --- 6 POK Active-High Power-OK Output. Connect a pullup resistor from this pin to a supply to create a reset signal that goes high after the regulator output has reached its regulation voltage. 7 --- OUTS MAX25301A MAX25301B 1, 2 www.maximintegrated.com Ground Sense. Connect GS to GND. Output Voltage Sense Input. Connect to the load at a point where accurate regulation is required to eliminate resistive metal drops. 19-100783 Maxim Integrated | 9 MAX25301A/MAX25301B 1A Automotive Low-Noise LDO Linear Regulator Pin Description (continued) PIN NAME FUNCTION MAX25301A MAX25301B --- 7 FB 8 8 BYP Bypass Capacitor Input. Connect a capacitor with a value from 0.001µF to 0.1µF between OUT and BYP to reduce output noise and set the regulator soft-start rate. 9, 10 9, 10 OUT Regulator Output. Sources up to 1A at the output regulation voltage. Bypass with a 10µF (4µF minimum including voltage derating) low-ESR (