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LMZ31707RVQT 数据表(PDF) 3 Page - Texas Instruments |
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LMZ31707RVQT 数据表(HTML) 3 Page - Texas Instruments |
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3 / 33 page  LMZ31707 www.ti.com SLVSBV7A – JUNE 2013 – REVISED AUGUST 2013 ELECTRICAL CHARACTERISTICS Over –40°C to 85°C free-air temperature, PVIN = VIN = 12 V, VOUT = 1.8 V, IOUT = 7 A, CIN = 0.1 µF + 2 x 22 µF ceramic + 100 µF bulk, COUT = 4 x 47 µF ceramic (unless otherwise noted) (1) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IOUT Output current TA = 85°C, natural convection 0 7 A VIN Input bias voltage range Over output current range 4.5 17 V PVIN Input switching voltage range Over output current range 2.95(2) 17(3) V VIN Increasing 4.0 4.5 UVLO VIN Undervoltage lockout V VIN Decreasing 3.5 3.85 VOUT(adj) Output voltage adjust range Over output current range 0.6 5.5 V Set-point voltage tolerance TA = 25°C, IOUT = 0 A ±1%(4) Temperature variation –40°C ≤ TA ≤ +85°C, IOUT = 0 A ±0.2% VOUT Line regulation Over input voltage range ±0.1% Load regulation Over output current range ±0.2% Total output voltage variation Includes set-point, line, load, and temperature variation ±1.5%(4) VOUT = 5.0 V, fSW = 1 MHz 94 % VOUT = 3.3 V, fSW = 750 kHz 92 % VOUT = 2.5 V, fSW = 750 kHz 90 % PVIN = VIN = 12 V VOUT = 1.8 V, fSW = 500 kHz 89 % IO = 4 A VOUT = 1.2 V, fSW = 300 kHz 87 % VOUT = 0.9 V, fSW = 250 kHz 85 % η Efficiency VOUT = 0.6 V, fSW = 200 kHz 82 % PVIN = VIN = 5 V VOUT = 3.3 V, fSW = 750 kHz 95 % IO = 4 A VOUT = 2.5 V, fSW = 750 kHz 93 % VOUT = 1.8 V, fSW = 500 kHz 92 % VOUT = 1.2 V, fSW = 300 kHz 90 % VOUT = 0.9 V, fSW = 250 kHz 87 % VOUT = 0.6 V, fSW = 200 kHz 84 % Output voltage ripple 20 MHz bandwith 14 mVP-P ILIM pin open 12 A ILIM Current limit threshold ILIM pin to AGND 9 A Recovery time tbd µs 1.0 A/µs load step from Transient response 25 to 75% IOUT(max) VOUT over/undershoot tbd mV Inhibit High Voltage 1.3 open(5) VINH Inhibit threshold voltage V Inhibit Low Voltage -0.3 1.1 INH Input current VINH < 1.1 V -1.15 μA IINH INH Hysteresis current VINH > 1.3 V -3.3 μA II(stby) Input standby current INH pin to AGND 2 10 µA Good 95% VOUT rising Fault 108% PWRGD Thresholds Power Good Fault 91% VOUT falling Good 104% PWRGD Low Voltage I(PWRGD) = 0.5 mA 0.3 V fSW Switching frequency RRT = 169 kΩ 400 500 600 kHz (1) See the Light Load Efficiency (LLE) section for more information for output voltages < 1.5 V. (2) The minimum PVIN is 2.95 V or (VOUT + 0.7 V), whichever is greater. See Table 9 for more details. (3) The maximum PVIN voltage is 17 V or (22 x VOUT), whichever is less. See Table 9 for more details. (4) The stated limit of the set-point voltage tolerance includes the tolerance of both the internal voltage reference and the internal adjustment resistor. The overall output voltage tolerance will be affected by the tolerance of the external RSET resistor. (5) This pin has an internal pull-up. If it is left open, the device operates when input power is applied. A small, low-leakage MOSFET is recommended for control. When the device is operating and no UVLO resistor divider is present on this pin, the open voltage is typically 2.9 V. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LMZ31707 |
类似零件编号 - LMZ31707RVQT |
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类似说明 - LMZ31707RVQT |
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