LM3687 Datasheet, PDF (13/35 Pages) National Semiconductor (TI) – Step-Down DC-DC Converter with Integrated Low Dropout Regulator and Startup Mode

LM3687
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SNVS473A – DECEMBER 2007 – REVISED JULY 2008
Electrical Characteristics^{(1) (2)} Thermal Protection
Symbol
Parameter
Conditions
T_SHDN ⁽³⁾
ΔT_SHDN
Thermal-Shutdown
Temperature
Thermal-Shutdown
Hysteresis
Typical
160
20
Limit
Min
Max
Units
°C
°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: V_BATT = 3.6V and T_A = 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.
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