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LM3687 Fiches technique(PDF) 7 Page - Texas Instruments |
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LM3687 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 30 page LM3687 www.ti.com SNVS473B – DECEMBER 2007 – REVISED MAY 2013 Electrical Characteristics: System Parameters Supply (1) (2) Limit Symbol Parameter Conditions Typical Units Min Max IQ_VBATT Quiescent current into EN_LIN = low, EN_DCDC = high, IOUT_DCDC = VBATT IOUT_LIN = 0mA, DC-DC is not switching 27 60 µA (FB_DCDC forced higher than VOUT_DCDC) EN_LIN = high, EN_DCDC = low 55 µA EN_LIN = EN_DCDC = high 65 µA Shutdown current into VEN_DCDC = VEN_LIN = 0V 0.1 5 µA VBATT -30°C ≤ TJ ≤ +85°C (1) All voltages are with respect to the potential at the SGND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for typ. specifications are: VBATT = 3.6V and TA = 25°C. Electrical Characteristics: Under-Voltage Protection (1) (2) Symbol Parameter Conditions Typical Limit Units Min Max VBATT_UVP Under-Voltage Lockout 2.41 V VBATT_EN System Enable Voltage 2.65 V (1) All voltages are with respect to the potential at the SGND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for typ. specifications are: VBATT = 3.6V and TA = 25°C. Electrical Characteristics: Enable Pins (EN_DCDC, EN_LIN) (1) (2) Limit Symbol Parameter Conditions Typical Units Min Max Enable pin input IEN 0.01 1 µA current Logic High voltage VIH 1.0 V level VIL Logic Low voltage level 0.4 V (1) All voltages are with respect to the potential at the SGND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for typ. specifications are: VBATT = 3.6V and TA = 25°C. Electrical Characteristics: Thermal Protection (1) (2) Limit Symbol Parameter Conditions Typical Units Min Max Thermal-Shutdown TSHDN (3) 160 °C Temperature Thermal-Shutdown ΔTSHDN 20 °C Hysteresis (1) All voltages are with respect to the potential at the SGND pin. (2) Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for typ. specifications are: VBATT = 3.6V and TA = 25°C. (3) The DC-DC converter will only enter thermal shutdown from PWM mode. At light loads -present for PFM mode- no significant contribution to the power dissipation is added by the DC-DC converter. Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM3687 |
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