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LMZ31506 Arkusz danych(PDF) 4 Page - Texas Instruments |
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LMZ31506 Arkusz danych(HTML) 4 Page - Texas Instruments |
4 / 35 page LMZ31506 SNVS993 – JUNE 2013 www.ti.com ELECTRICAL CHARACTERISTICS Over –40°C to 85°C free-air temperature, PVIN = VIN = 12 V, VOUT = 1.8 V, IOUT = 6 A, CIN1 = 2 x 22 µF ceramic, CIN2 = 68 µF poly-tantalum, COUT1 = 4 x 47 µF ceramic (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IOUT Output current TA = 85°C, natural convection 0 6 A VIN Input bias voltage range Over IOUT range 4.5 14.5 V PVIN Input switching voltage range Over IOUT range 1.6(1) 14.5(2) 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 IOUT range 0.6(2) 5.5 V Set-point voltage tolerance TA = 25°C, IOUT = 0A ±1.0% (3) Temperature variation -40°C ≤ TA ≤ +85°C, IOUT = 0A ±0.3% VOUT Line regulation Over PVIN range, TA = 25°C, IOUT = 0A ±0.1% Load regulation Over IOUT range, TA = 25°C ±0.1% Total output voltage variation Includes set-point, line, load, and temperature variation ±1.5% (3) VOUT = 5 V, fSW = 780 kHz 92 % VOUT = 3.3 V, fSW = 630 kHz 91 % VOUT = 2.5 V, fSW = 530 kHz 89 % PVIN = VIN = 12 V IO = 2 A VOUT = 1.8 V, fSW = 480 kHz 88 % VOUT = 1.2 V, fSW = 480 kHz 85 % VOUT = 0.8 V, fSW = 480 kHz 80 % η Efficiency PVIN = VIN = 5 V VOUT = 3.3V, fSW = 630 kHz 95 % IO = 2 A VOUT = 2.5V, fSW = 530 kHz 93 % VOUT = 1.8V, fSW = 480 kHz 91 % VOUT = 1.2V, fSW = 480 kHz 89 % VOUT = 0.8V, fSW = 480 kHz 85 % VOUT = 0.6V, fSW = 250 kHz 83 % Output voltage ripple 20 MHz bandwith 30 mVPP ILIM Overcurrent threshold 11 A Recovery time 80 µs 1.0 A/µs load step Transient response from 50 to 100% IOUT(max) VOUT over/undershoot 60 mV VINH-H Inhibit High Voltage 1.30 Open (4) Inhibit Control V VINH-L Inhibit Low Voltage –0.3 1.05 INH Input current INH < 1.1 V -1.15 μA INH Hysteresis current INH > 1.26 V -3.4 μA II(stby) Input standby current INH pin to AGND 2 4 µA Good 94% VOUT rising Fault 109% PWRGD Thresholds Power Fault 91% Good VOUT falling Good 106% PWRGD Low Voltage I(PWRGD) = 2 mA 0.3 V fSW Switching frequency Over VIN and IOUT ranges, RT/CLK pin OPEN 200 250 300 kHz fCLK Synchronization frequency 250 780 kHz VCLK-H CLK High-Level 2.0 5.5 V CLK Control VCLK-L CLK Low-Level 0.8 V DCLK CLK Duty cycle 20% 80% Thermal shutdown 160 175 °C Thermal Shutdown Thermal shutdown hysteresis 10 °C (1) The minimum PVIN voltage is 1.6V or (VOUT+ 0.9V), whichever is greater. VIN must be greater than 4.5V. (2) The maximum PVIN voltage is 14.5V or (15 x VOUT), whichever is less. (3) 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. (4) This control pin has an internal pullup. If this pin is left open circuit, the device operates when input power is applied. A small low- leakage MOSFET is recommended for control. See the application section for further guidance. 4 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: LMZ31506 |
Podobny numer części - LMZ31506_15 |
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Podobny opis - LMZ31506_15 |
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