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TPS79418DGNT Datasheet(PDF) 4 Page - Texas Instruments |
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TPS79418DGNT Datasheet(HTML) 4 Page - Texas Instruments |
4 / 15 page www.ti.com ELECTRICAL CHARACTERISTICS TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433 SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004 Over recommended operating temperature range (T J = -40°C to 125°C), VEN = VIN, VIN = VOUT(nom) + 1 V (1), I OUT = 1mA, C OUT = 10µF, CNR = 0.01 µF, unless otherwise noted. Typical values are at 25°C. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIN Input voltage(1) 2.7 5.5 V IOUT Continuous output current 0 250 mA VFB Internal reference TPS79401 TJ = 25°C 1.220 1.225 1.230 V VOUT Output voltage range TPS79401 VFB 5.5 - VDO V Accuracy(1) VOUT + 1 V ≤ VIN ≤ 5.5 V 0 mA ≤ IOUT ≤ 250 mA -3.0 +3.0 % Output voltage line regulation VOUT + 1 V < VIN ≤ 5.5 V 0.05 0.12 %/V ( ∆V OUT%/∆VIN) (1) Load regulation ( ∆V OUT%/∆IOUT) 0 µA < IOUT < 250 mA 10 mV TPS79428 IOUT = 250 mA 155 210 Dropout voltage(2) TPS79430 IOUT = 250 mA 155 210 mV VIN = VOUT(nom) - 0.1 V TPS79433 IOUT = 250 mA 145 200 Output current limit VOUT = 0 V 925 mA Ground pin current 0 µA < IOUT < 250 mA 170 220 µA Shutdown current(3) VEN = 0 V 2.7 V < VIN < 5.5 V 0.07 1 µA FB pin current VFB = 1.8 V 1 µA f = 100 Hz IOUT = 250 mA 65 Power-supply ripple TPS79428 f = 10 kHz IOUT = 250 mA 60 dB rejection f = 100 kHz IOUT = 250 mA 40 CNR = 0.001 µF 55 CNR = 0.0047 µF 36 BW = 100 Hz to 100 Output noise voltage (TPS79428) µVRMS kHz, IOUT = 250 mA CNR = 0.01 µF 33 CNR = 0.1 µF 32 CNR = 0.001 µF 50 Time, start-up (TPS79428) RL - 14 Ω, COUT = 1 µF CNR = 0.0047 µF 70 µs CNR = 0.01 µF 100 High-level enable input voltage 2.7 V < VIN < 5.5 V 1.7 VIN V Low-level enable input voltage 2.7 V < VIN < 5.5 V 0 0.7 V EN pin current VEN = 0 1 1 µA UVLO threshold VCC rising 2.25 2.65 V UVLO hysteresis 100 mV (1) Minimum VIN is 2.7 V or VOUT + VDO, whichever is greater. (2) Dropout is not measured for the TPS79418 and TPS79425 since minimum VIN = 2.7 V. (3) For adjustable versions, this applies only after VIN is applied; then VEN transitions high to low. 4 |
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