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TPS62420DRCR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS62420DRCR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 32 page www.ti.com TPS62420 SLVS676B – JUNE 2006 – REVISED OCTOBER 2006 ELECTRICAL CHARACTERISTICS (continued) V IN = 3.6V, VOUT = 1.8V, EN = VIN, MODE = GND, L = 2.2µH, COUT = 20µF, TA = –40°C to 85°C typical values are at TA = 25 °C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWER SWITCH RDS(ON) P-Channel MOSFET On-resistance, VIN = VGS = 3.6V 280 620 m Ω Converter 1,2 ILK_PMOS P-Channel leakage current VDS = 6.0V 1 µA RDS(ON) N-Channel MOSFET On-resistance VIN = VGS = 3.6V 200 450 m Ω Converter 1,2 ILK_SW1/SW2 Leakage Current into SW1/SW2 Pin Includes N-Chanel leakage currnet, 6 7.5 µA VIN = open, VSW = 6.0V, EN = GND(4) ILIMF Forward Current OUT1 600mA 2.5V ≤ V IN≤ 6.0V 0.85 1.0 1.15 A Limit PMOS and OUT2 1000mA 1.19 1.4 1.61 NMOS TSD Thermal shutdown Increasing junction temperature 150 °C Thermal shudown hysteresis Decreasing junction temperature 20 °C OSCILLATOR fSW Oscillator frequency 2.5V ≤ VIN ≤ 6.0V 2.0 2.25 2.5 MHz OUTPUT VOUT Adjustable output votage range 0.6 VIN V Vref Reference voltage 600 mV Voltage positioning active, MODE/DATA = GND, 1.01x VOUT (PFM) device operating in PFM mode, VIN = 2.5V to –1.5% 2.5% VOUT 5.0V (6)(7) DC output voltage accuracy PFM mode, adjustable and fixed output MODE/DATA = GND; device operating in PWM –1% 0% 1% voltage(5) Mode VIN = 2.5V to 6.0V(7) VOUT VIN = 2.5V to 6.0V, Mode/Data = VIN , Fixed PWM –1% 0% 1% operation, 0mA < IOUT < IOUTMAX(8) DC output voltage load regulation PWM operation mode 0.5 %/A tStart up Start-up time Activation time to start switching(9) 170 µs tRamp VOUT Ramp UP time Time to ramp from 5% to 95% of VOUT 750 µs (4) At pins SW1 and SW2 an internal resistor of 1M Ω is connected to GND (5) Output voltage specification does not include tolerance of external voltage programming resistors (6) Configuration L typ 2.2 µH, C OUT typ 20µF, see parameter measurement information, the output voltage ripple depends on the effective capacitance of the output capacitor, larger output capacitors lead to tighter output voltage tolerance (7) In Power Save Mode, PWM operation is typically entered at IPSM = VIN/32Ω. (8) For VOUT > 2.2V, VIN min = VOUT +0.3V (9) This time is valid if one converter turns from shutdown mode (EN2 = 0) to active mode (EN2 =1) AND the other converter is already enabled (e.g., EN1 = 1). In case both converters are turned from shutdown mode (EN1 and EN2 = low) to active mode (EN1 and/or EN2=1) a value of typ 80 µs for ramp up of internal circuits needs to be added. After t Start the converter starts switching and ramps VOUT. 4 Submit Documentation Feedback |
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