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LM3643AYFFR Datasheet(PDF) 5 Page - Texas Instruments |
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LM3643AYFFR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 39 page LM3643, LM3643A www.ti.com SNVS967A – AUGUST 2014 – REVISED NOVEMBER 2014 8.5 Electrical Characteristics Typical limits tested at TA = 25°C. Minimum and maximum limits apply over the full operating ambient temperature range ( −40°C ≤ TA ≤ 85°C). Unless otherwise specified, VIN = 3.6 V, HWEN = VIN. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CURRENT SOURCE SPECIFICATIONS VOUT = 4 V, flash code = 0x7F = 1.5 A –7% 1.5 7% A flash ILED1/2 Current source accuracy VOUT = 4 V, torch code = 0x3F = 89.3 mA –10% 89.3 10% mA torch ILED1/2 = 729 mA Flash 290 LED1 and LED2 current source VHR mV regulation voltage ILED1/2 = 179 mA Torch 158 ON threshold 4.86 5 5.1 VOVP V OFF threshold 4.75 4.88 4.99 STEP-UP DC/DC CONVERTER SPECIFICATIONS RPMOS PMOS switch on-resistance 86 m Ω RNMOS NMOS switch on-resistance 65 Reg 0x07, bit[0] = 0 –12% 1.9 12% ICL Switch current limit A Reg 0x07, bit[0] = 1 –12% 2.8 12% UVLO Undervoltage lockout threshold Falling VIN –2% 2.5 2% V VTRIP NTC comparator trip threshold Reg 0x09, bits[3:1] = '100' –5% 0.6 5% V INTC NTC current –6% 50 6% µA Input voltage flash monitor trip VIVFM Reg 0x02, bits[5:3] = '000' –3% 2.9 3% V threshold IQ Quiescent supply current Device not switching pass mode 0.3 0.75 mA Device disabled, HWEN = 0 V ISD Shutdown supply current 0.1 4 µA 2.5 V ≤ VIN ≤ 5.5 V Device disabled, HWEN = 1.8 V ISB Standby supply current 2.5 10 µA 2.5 V ≤ VIN ≤ 5.5 V HWEN, TORCH/TEMP, STROBE, TX VOLTAGE SPECIFICATIONS VIL Input logic low 0 0.4 2.5 V ≤ VIN ≤ 5.5 V V VIH Input logic high 1.2 VIN I2C-COMPATIBLE INTERFACE SPECIFICATIONS (SCL, SDA) VIL Input logic low 0 0.4 2.5 V ≤ VIN ≤ 4.2 V V VIH Input logic high 1.2 VIN VOL Output logic low ILOAD = 3 mA 400 mV (1) 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. (2) All voltages are with respect to the potential at the GND pin. 8.6 Timing Requirements MIN NOM MAX UNIT t1 SCL clock period 2.4 µs t2 Data in set-up time to SCL high 100 t3 Data out stable After SCL low 0 ns t4 SDA low set-up time to SCL Low (start) 100 t5 SDA high hold time after SCL high (stop) 100 8.7 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ƒSW Switching frequency 2.5 V ≤ VIN ≤ 5.5 V –6% 4 6% MHz Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3643 LM3643A |
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