LM3687
www.
ti.
com
SNVS473B – DECEMBER 2007 – REVISED MAY 2013
LM3687 Step-Down DC-DC Converter with Integrated Low Dropout Regulator and Startup Mode
Check for Samples: LM3687
FEATURES
1
2DC-DC Converter:
• 750mA Maximum Load Capability • 1.
8MHz PWM Fixed Switching Frequency
(Typ.
) • Automatic PFM/PWM Mode Switching • 27µA typ.
Quiescent Current • Internal Synchronous Rectification for High
Efficiency • Internal Soft Start
Dual Rail Linear Regulator: • Startup Mode • Load Transients 25mVpeak Typ.
• Line Transients 1mVpeak Typ.
• Very Low Dropout
Voltage: 82mV Typ.
at
350mA Load Current • 0.
7V ≤ VIN_LIN ≤ 4.
5V • 10µA Typical IQ from VIN_LIN • 350mA Maximum Load Capability
Combined Com...