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LM3631 Fiches technique(PDF) 9 Page - Texas Instruments |
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LM3631 Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 57 page LM3631 www.ti.com SNVS834 – AUGUST 2014 Electrical Characteristics (continued) Unless otherwise specified, limits apply over the full operating ambient temperature range ( −40°C ≤ TA ≤ 85°C), VIN = 3.6 V, VPOS = VOREF = 5.4 V, VNEG = –5.4 V, VBST = 5.7 V, VCONT = 3.3V. PARAMETER TEST CONDITION MIN TYP MAX UNIT PGFALLING Power good decreasing % of target VLDO_OREF 90% IOREF_MAX Maximum output current 50 mA ICL_OREF Output current limit 80 mA VBIASBST = 5.8 V, VOREF = 5.5 V, IRUSH_PK_OREF Peak start-up inrush current (8) 250 mA COREF = 10 µF ILOAD_LDO_OREF = VDO_OREF LDO_OREF dropout voltage (9) ILOAD_LDO_OREF_MAX, VLDO_OREF = 80 mV 4.0 V F = 10 Hz to 500 kHz @ Imax/2, Power supply rejection ratio, PSRROREF VBST_OUT to VLDO_OREF, 300 mV 25 dB LDO_OREF (8) minimum headroom Start-up time, LDO_OREF, COREF = 10 µF, VLDO_OREF = 5.5 V tST_OREF 1 ms VLDO_OREF = 10% to 90% (8) Output pull-down resistor, LDO_OREF pull-down enabled, RPD_OREF 130 200 270 Ω LDO_OREF LDO_OREF disabled LCD CONTROLLER SUPPLY OUTPUT (LDO_CONT) LDO_CONT_VOUT = 00 1.8 LDO_CONT_VOUT = 01 2.3 Output voltage V LDO_CONT_VOUT = 10 2.8 LDO_CONT_VOUT = 11 3.3 Output accuracy Output Voltage = 1.8 V, 1-mA load –2% 2% VCONT LDO_CONT line transient response VIN + 500 mVp-p AC Square –50 50 mV (8) Wave, 100 mV/µs 200 Hz at 5 mA LDO_CONT load transient response 5-mA to 80-mA load transient @ 2 –50 50 mV (8) µs TRISE/FALL DC load regulation (8) 1 mA ≤ ILOAD_LDO_CONT ≤ 80 mA 20 mV ICONT_MAX Maximum output current 80 mA ICL_CONT Output current limit 130 mA VDO_CONT LDO_CONT dropout voltage (10) ILOAD = 80 mA, VCONT = 3.3 V 80 mV F = 10 Hz to 500 kHz @ Imax/2 VIN Power supply rejection ratio, PSRRLDO_CONT to VLDO_CONT, 300-mV minimum 25 dB LDO_CONT (11) headroom Start-up time, LDO_CONT, VCONT = VCONT = 1.8 V tST_CONT 1 ms 10% to 90% (11) Output pull-down resistor, LDO_CONT pull-down enabled, RPD_CONT 200 Ω LDO_CONT LDO_CONT disabled LOGIC INPUTS (PWM, NRST, LCD_EN, SCL, SDA, OTP_SEL) VIL Input logic low 0 0.4 V VIH Input logic high 1.2 VIN V IINPUT Logic input current –1 1 µA LOGIC OUTPUTS (SDA, FLAG) VOL Output logic low IOL = 3 mA 0 0.4 V ILEAKAGE Output leakage current 1 µA PWM INPUT ƒPWM_INPUT PWM input frequency 100 20000 Hz tMIN Minimum PWM ON/OFF time 400 ns tTIMEOUT PWM timeout(11) 24 ms (9) VBST – VOREF when VOREF has dropped 100 mV below target. (10) VIN – VCONT when VCONT has dropped 100 mV below target. (11) Limits set by characterization and/or simulation only. Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM3631 |
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