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A4410 Datasheet(PDF) 10 Page - Allegro MicroSystems |
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A4410 Datasheet(HTML) 10 Page - Allegro MicroSystems |
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10 / 41 page  Adjustable Frequency Buck or Buck/Boost Pre-Regulator with a Synchronous Buck, 3 Internal LDOs, Window Watchdog Timer, and NPOR A4410 10 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ. Max. Unit 1V25 Output Voltage Output Voltage Accuracy V1V25 50 mA < I1V25 < 750 mA 1.23 1.25 1.27 V Pulse Width Modulation (PWM) PWM Ramp Offset PWM2OFFS VCOMP2 for 0% duty cycle − 350 − mV High-Side MOSFET Minimum ON- Time tON(MIN) − 65 105 ns High-Side MOSFET Minimum OFF- Time tOFF(MIN) Does not include total gate driver non-overlap time, tNO − 100 130 ns Gate Driver Non-Overlap Time 2 tNO − 15 − ns COMP2 to LX2 Current gain gmPOWER2 − 2.5 − A/V Slope Compensation 2 SE2 fOSC = 2.0 MHz 0.45 0.63 0.81 A/μs fOSC = 400 kHz 0.12 0.14 0.19 Internal MOSFETs High-Side MOSFET ON Resistance RDSON (HS) TA = 25°C 3, IDS = 100 mA − 200 235 mΩ IDS = 100 mA − − 400 mΩ LX2 Node Rise/Fall Time 2 t R/F,LX2 VVREG = 5.5 V − 12 − ns High-Side MOSFET Leakage 1 IDSS (HS) VENBATx ≤ 2.2 V and VENB ≤ 0.8 V, VLX2 = 0 V, VVREG = 5.5 V, ‒40˚C < TJ < 85˚C 3 − − 2 μA VENBATx ≤ 2.2 V and VENB ≤ 0.8 V, VLX2 = 0 V, VVREG = 5.5 V, −40°C < TJ < 150°C − 3 15 μA Low-Side MOSFET ON Resistance RDSON (LS) TA = 25°C 3, IDS = 100 mA − 55 65 mΩ IDS = 100 mA − − 110 mΩ Low-Side MOSFET Leakage 1 IDSS (LS) VENBATx ≤ 2.2 V and VENB ≤ 0.8 V, VLX2 = 5.5 V, ‒40˚C < TJ < 85˚C 3 − − 1 μA VENBATx ≤ 2.2 V and VENB ≤ 0.8 V, VLX2 = 5.5 V, −40°C < TJ < 150°C − 8 20 μA 1 Negative current is defined as coming out of the node or pin (sourcing), positive current is defined as going into the node or pin (sinking). 2 Ensured by design and characterization, not production tested. 3 Specifications at 25°C or 85°C are guaranteed by design and characterization, not production tested. 4 The lowest operating voltage is only valid if the conditions VVIN > VVIN,START and VVCP – VVIN > VCPUV,H and VVREG > VREGUV,H are satisfied before VIN is reduced. ELECTRICAL CHARACTERISTICS – 1.25 V SYNCHRONOUS BUCK REGULATOR1: valid at 3.6 V 4 < VIN < 36 V, –40ºC < TA = TJ < 150ºC, unless otherwise specified. |
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