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LM3642 Datasheet(PDF) 5 Page - Texas Instruments |
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LM3642 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 30 page LM3642 www.ti.com SNVS891H – SEPTEMBER 2012 – REVISED SEPTEMBER 2015 6.5 Electrical Characteristics MIN and MAX limits apply over the full operating ambient temperature range ( −40°C ≤ TA ≤ 85°C). Unless otherwise specified, TA = 25°C, VIN = 3.6 V. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CURRENT SOURCE SPECIFICATIONS 1-A flash, VOUT = 4 V –6% 1.04 6% A 1.5-A flash, VOUT = 4 V –8% 1.5 8% A ILED Current source accuracy 24-mA torch, VOUT = 4 V –10% 24 10% mA (LM3642-LT) 48.4 mA Torch, VOUT = 4 V –10% 48.4 10% mA ILED = 1.5 A Flash 275 12% Current source regulation VHR mV voltage ILED = 24 mA/48.4 mA Torch 150 15% ON threshold –2.8% 5 2.2% Output overvoltage protection VOVP V trip point OFF threshold –2.7% 4.88 2.3% STEP-UP DC-DC CONVERTER SPECIFICATIONS RPMOS PMOS switch on-resistance IPMOS = 1 A 120 m Ω RNMOS NMOS switch on-resistance INMOS = 1 A 90 –17% 1.6 15% ICL Input current limit A –17% 1.88 15% Input voltage flash monitor trip VIVFM –3.2% 2.9 3.2% V threshold UVLO Undervoltage threhold Falling VIN –4% 2.8 4% V ƒSW Switching frequency –9% 4 9% MHz IQ Quiescent supply current Device not switching pass mode 0.75 mA ISB Standby supply current Device disabled 2.5 V ≤ VIN ≤ 5.5 V 1.6 4 µA Flash-to-torch LED current TX low to high tTX 4 µs settling time ILED = 1.5 A to 24 mA/48.4 mA STROBE, TX VOLTAGE SPECIFICATIONS VIL Input logic low 2.5 V ≤ VIN ≤ 5.5 V 0 0.4 V VIH Input logic high 2.5 V ≤ VIN ≤ 5.5 V 1.2 VIN I2C-COMPATIBLE INTERFACE SPECIFICATIONS (SCL, SDA) VIL Input logic low 2.5 V ≤ VIN ≤ 5.5 V 0 0.4 V VIH Input logic high 2.5 V ≤ VIN ≤ 4.2 V 1.2 VIN VOL Output logic low ILOAD = 3 mA 400 mV (1) All voltages are with respect to the potential at the GND pin. (2) Minimum (Min) and Maximum (Max) limits are specified by design, test, or statistical analysis. Typical (Typ) numbers are not verified, but do represent the most likely norm. Unless otherwise specified, conditions for typical specifications are: VIN = 3.6 V and TA = 25°C. Copyright © 2012–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3642 |
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