Datasheet Analog Devices LTC3539-2 — Datenblatt

LTC3539/LTC3539-2
2A, 1MHz/2MHz
Synchronous Step-Up
DC/DC Converters
FEATURES DESCRIPTION Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells Delivers 5V at 900mA From a Lithium-Polymer
Battery
n V Start-Up Voltage: 700mV
IN
n 1.5V to 5.25V V
OUT Range
n Up to 94% Efficiency
n V > V
IN
OUT Operatio ±1.5% Feedback Voltage Tolerance
n 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed
Frequency Operatio Output Disconnect
n Selectable Burst Mode® or PWM Operatio 10µA Quiescent Current
n Logic Controlled Shutdown: VOUT operation
and short circuit protection features.
PCB LAYOUT GUIDELINES
The high speed operation of the LTC3539 demands careful
attention to board layout. A careless layout will result in
reduced performance. Figure 1 shows the recommended …