PDF《典型工作电路》

70 mV OUT Output Voltage Range VOUT 0.6 5.2 V Load Regulation IOUT = 30mA to 2A 0.1 %/A Line Regulation VIN = 1.7V to 5.5V, VOUT = 0.6V, IOUT = 190mA -0.15 +0.15 %/V Dropout Voltage IOUT = 2A, VFB = 580mV (Note 4)

50 150 mV In-Regulation Current Limit VIN = 5.5V, VFB = 500mV 2.5 A Short-Circuit Foldback Current Limit VIN = 5.5V, VOUT = 0V, VFB <

100mV 1.4 A Output Shutdown Leakage VIN = 5.5V, VOUT = 0V, VEN = 0V

5 FA Line Transient DVIN = 0.5V, tRISE = tFALL = 5Fs

2 % MAX15104 小尺寸、2A、低压差、线性稳压器, 采用2.7mm x 1.6mm封装 Maxim Integrated ??

3 Note 3: All devices 100% production tested at TA = +25°C. Limits over the temperature range are guaranteed by design. Note 4: Dropout is defined as VIN - VOUT when VOUT falls 3% below its nominal voltage value. ELECTRICAL CHARACTERISTICS (continued) (VIN = 3.3V, VOUT = 1.5V, VEN = VIN, IOUT = 100mA, CIN = 2.2?F, COUT = 22?F, TA = TJ = -40NC to +85NC, typical values are at TA = +25NC, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Load Transient IOUT = 100mA to 1A to 100mA, tRISE = tFALL = 1Fs 1.3 % Power-Supply Rejection Frequency = 500kHz, IOUT = 500mA

70 dB Output Voltage Noise Frequency = 500Hz to 100kHz, IOUT = 100mA

15 FVRMS FB FB Threshold Accuracy IOUT = 190mA, VOUT = 1.5V to 5V, VIN = (VOUT + 0.3V) to 5.5V

593 600

606 mV IOUT = 3mA to 2A, VOUT = 1.5V to 5V, VIN = (VOUT + 0.3V) to 5.5V

590 610 FB Input Current VFB = 0.6V, VIN = 5.5V

1 FA GND Ground Supply Current 1.8 3.5 mA Ground Shutdown Current VIN = 1.7V to 5.5V

1 FA POWER-GOOD OUTPUT Power-Good (PG) Threshold VFB moving out of regulation, VHYS = 15mV FB = high

638 650

662 mV FB = low

538 550

562 Power-Good (PG) Output- Voltage Low IPG = 2mA (sink)

25 80 mV Power-Good (PG) Delay

100 Fs Power-Good (PG) Leakage VPG = 5.5V

1 FA ENABLE Enable Input High Threshold VEN_HIGH 1.2 V Enable Input Low Threshold VEN_LOW 0.4 V Enable Input Bias Current VEN =

0 to 5.5V -1 +1 FA SOFT-START Soft-Start Charging Current VSS_BYP = 100mV

8 9.2

12 FA Soft-Start Pulldown Resistance VEN = 0V, ISS_BYP = 2mA

45 100 I THERMAL SHUTDOWN Thermal Shutdown Threshold +160 NC Thermal Shutdown Hysteresis Threshold falling

15 NC Maxim Integrated ??

4 典型工作特性 (VIN = 1.8V, VOUT = 1.5V, TA = +25NC, unless otherwise noted.) DROPOUT VOLTAGE vs. OUTPUT CURRENT MAX15104 toc01 OUTPUT CURRENT (A) DROPOUT VOLTAGE (mV) 1.5 1.0 0.5

10 20

30 40

50 60

70 80

0 0 2.0 VOUT = 2.5V VOUT = 1.8V VOUT = 3.3V VOUT = 5V DEFINED VIN - VOUT WHEN VOUT FALLS 2% BELOW NOMINAL OUTPUT VOLTAGE vs. TEMPERATURE MAX15104 toc04 TEMPERATURE (°C) OUTPUT VOLTAGE (V)

60 35

10 -15 1.482 1.484 1.486 1.488 1.490 2A LOAD 1A LOAD 1.492 1.494 1.496 1.498 1.500 1.480 -40

85 NO LOAD FB VOLTAGE vs. TEMPERATURE (VOUT = 1.5V) MAX15104 toc07 TEMPERATURE (°C) FB VOLTAGE (V)

60 35

10 -15 0.592 0.593 0.594 0.595 0.596 0.597 0.598 0.599 0.600 0.591 -40

85 2A LOAD NO LOAD 1A LOAD OUTPUT VOLTAGE ERROR vs. OUTPUT CURRENT MAX15104 toc02 OUTPUT CURRENT (A) OUTPUT VOLTAGE ERROR (%) 2.5 2.0 1.5 1.0 0.5 -0.05

0 0.05 0.10 -0.10

0 3.0 VOUT = 3V VOUT = 2.5V VOUT = 1.5V STARTUP WAVEFORMS MAX15104 toc05 CSS =100nF VEN 1V/div IIN 2A/div VOUT 1V/div VPG 1V/div 1ms/div 1A LOAD-TRANSIENT RESPONSE MAX15104 toc08 IOUT 500mA/div VOUT AC-COUPLED 50mV/div 100mA 1A 40?s/div OUTPUT VOLTAGE vs. INPUT VOLTAGE MAX15104 toc03 INPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 4.8 4.3 3.8 3.3 2.8 2.3 1.490 1.495 1.500 1.505 1.510 1.515 IOUT = 0.5A 1.485 1.8 5.3 SOFT-START TIME vs. CAPACITOR VALUE MAX15104 toc06 CAPACITOR VALUE (nF) SOFT-START TIME (ms)