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LM3242TME/NOPB Datasheet(PDF) 5 Page - Texas Instruments |
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LM3242TME/NOPB Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 32 page  LM3242 www.ti.com SNOSB48E – OCTOBER 2011 – REVISED AUGUST 2015 6.5 Electrical Characteristics All typical limits in are for TA = TJ = 25°C; all minimum and maximum limits apply over the full operating ambient temperature range ( −30°C ≤ TA = TJ ≤ +90°C). Unless otherwise noted, all specifications apply to the Typical Application with VIN = EN = 3.6 V, and BPEN = NC = 0 V. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VFB,MIN Feedback voltage at PWM mode, VCON = 0.16 V(1) 0.38 0.4 0.42 V minimum setting VFB,MAX Feedback voltage at PWM mode, VCON = 1.44 V, VIN = 4 V 3.55 3.6 3.65 V maximum setting ISHDN Shutdown supply current EN = SW = VCON = FB = BPEN = NC = 0 V(2) 0.1 1 µA IQ_PWM PWM mode quiescent PWM mode, No switching 650 795 µA current VCON = 0.13 V, FB = 1 V(3) EN = VIN, BPEN = NC = 0 V, SW = TriState µA IQ_SLEEP Low-power SLEEP mode 60 80 VCON < 0.08 V(3) IQ_ECO ECO mode Quiescent ECO mode, No switching 60 80 µA current VCON = 0.8 V, FB = 2.05 V(3) RDSON (P) Pin-pin resistance for PFET VIN = VGS = 3.6 V, ISW = 200 mA 170 260 m Ω RDSON (N) Pin-pin resistance for NFET VIN = VGS = 3.6 V, ISW = −200 mA 110 200 m Ω Pin-Pin resistance for RDSON (BP) VIN = VGS = 3.1 V, ISW = −200 mA 80 110 m Ω BPFET ILIM P PFET switch peak current See(4) 1300 1450 1600 mA limit BPFET switch peak current ILIM BP VFB = VIN − 1 V (4) 310 400 mA limit FOSC Internal oscillator frequency 5.7 6 6.3 MHz VIH EN, BPEN logic high input 1.2 V threshold VIL EN, BPEN logic low input 0.4 V threshold Gain VCON to VOUT gain 0.16 V ≤ VCON ≤ 1.44 V(5) 2.5 V/V IVCON VCON pin leakage current VCON = 1 V ±1 µA Auto bypass detection VCON = 1.2 V (VOUT-SET = 3 V) VBP,NEG 165 200 235 mV negative threshold VIN = 3.2 V, RL = 6 Ω, IOUT = 500 mA (6) Auto bypass detection VCON = 1.2 V (VOUT-SET = 3 V) VBP,POS 215 250 285 mV positive threshold VIN = 3.25 V, RL = 6 Ω, IOUT = 500 mA (7) Auto bypass IOUT slew IBP,SLEW BPEN = High, Forced bypass 1600 mA current (1) All 0.4-V VOUT specifications are at steady-state only. (2) Shutdown current includes leakage current of PFET. (3) IQ specified here is when the part is not switching under test mode conditions. For operating quiescent current at no load, refer to Typical Characteristics. (4) Current limit is built-in, fixed, and not adjustable. (5) Care must be taken to keep the VCON pin voltage less than the VIN pin voltage as this can place the part into a manufacturing test mode. (6) Entering Bypass mode VIN is compared to the programmed output voltage (2.5 × VCON). When VIN − (2.5 × VCON) falls below VBP,NEG longer than TBP,NEG, the Bypass FET turns on, and the switching FET turns on. (7) Bypass mode is exited when VIN − (2.5 × VCON) exceeds VBP,POS longer than TBP,POS, and PWM mode resumes. The hysteresis for the bypass detection threshold VBP,POS – VBP,NEG is always positive and will be approximately 50 mV. Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3242 |
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