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TPS81256SIPR Datasheet(PDF) 3 Page - Texas Instruments |
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TPS81256SIPR Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 23 page  TPS81256 www.ti.com SLVSAZ9 – JUNE 2012 THERMAL INFORMATION TPS8125x THERMAL METRIC(1)(2) SIP UNIT 9 PINS θJA Junction-to-ambient thermal resistance 62 ψJB Junction-to-board characterization parameter 31 °C/W ψJT Junction-to-case (top) thermal resistance (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. (2) Thermal data have been simulated with high-K board (per JEDEC standard). RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT VI Input voltage range TPS81256 2.5 5.5 V RL Minimum resistive load for start-up (VI ≤ 4.8V) TPS81256 65 Ω CEXT Output capacitance 2 30 µF TA Ambient temperature –40 85 °C TJ Operating junction temperature –40 125 °C TCASE_IND Operating inductor case temperature 125 °C TCASE_CAP Operating capacitor case temperature 85 °C ELECTRICAL CHARACTERISTICS Minimum and maximum values are at VIN = 2.5V to 5.5V, VOUT = 5.0V (or VIN, whichever is higher), EN = 1.8V, TA = –40°C to 85°C; Circuit of Parameter Measurement Information section (unless otherwise noted). Typical values are at VIN = 3.6V, VOUT = 5.0V, EN = 1.8V, TA = 25°C (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT Operating quiescent current into VIN (1) IOUT = 0mA, VOUT = 5.0V, VIN = 3.6V 30 50 µA IQ TPS8125X EN = VIN Operating quiescent current into VOUT (1) 7 20 µA Device not switching ISD Shutdown current(1) TPS8125x EN = GND 0.85 5.0 μA Falling 2.0 2.1 V VUVLO Under-voltage lockout threshold TPS81256 Hysteresis 0.1 V ENABLE VIL Low-level input voltage 0.4 V VIH High-level input voltage TPS8125x 1.0 V Ilkg Input leakage current Input connected to GND or VIN 0.5 µA OUTPUT 2.5V ≤ VIN ≤ 4.85V, IOUT = 0mA 4.92 5 5.08 V PWM operation. Open Loop 3.3V ≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 550mA VOUT Regulated DC output voltage TPS81256 4.85 5 5.2 V PFM/PWM operation 2.9V ≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 450mA 4.85 5 5.2 V PFM/PWM operation Power-save mode output ripple voltage PFM operation, IOUT = 1mA 35 mVpk ΔVOUT TPS81256 PWM mode output ripple voltage PWM operation, IOUT = 200mA 8 mVpk POWER SWITCH rDS(on) Input-to-output On-resistance TPS8125x VI = 5.25 V. Device not switching 320 m Ω Ilkg Reverse leakage current into VOUT(1) TPS81256 EN = GND 5 µA ILIM Average input current limit TPS8125x EN = VIN. VIN = 3.3V 1180 mA Overtemperature protection 140 °C TPS8125x Overtemperature hysteresis 20 °C (1) Maximum values can vary over lifetime due to intrinsic capacitor ageing effects. For more details, refer to THERMAL AND RELIABILITY INFORMATION section. Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS81256 |
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