Marquette Hellige GmbH MicroSmart V 2.xx Page 14
Servicing Instructions 227 470 35 B - 97.12
Voltage supply +5V
Switching
Regulator
Uin
GND
GND
Uout
5V DC/DC converter
X500
L500
A 500KHz step-down switching regulator is used to generate the 5V voltage. The high-rate
switching frequency allows the entire circuit to be built up with SMD components. The switching
regulator is the module type LT1376. All the functions necessary for a step-down regulator are
integrated in this module.
Input voltage 10V...16V
Output voltage +5 V ± 2%
Output current min. 100 mA, max. 700 mA
Efficiency > 80%
Short-circuit-proof
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