AATIAN28 Datasheet, PDF (2/6 Pages) SiGe Semiconductor, Inc. – 1MHz 2.5A Buck DC/DC Converter

EV-107
AAT1155 EVAL
1MHz 2.5A Buck DC/DC Converter
Specification
Input Voltage
Output Error Voltage
Output Current
Test Conditions
Min
Typ
2.7
3.6
±3
0
Table 1: AAT1155 Evaluation Board Specifications.
Max
5.5
2.5
Units
V
%
A
Figure 2: AAT1155 Evaluation
Board PCB Top Side.
Figure 3: AAT1155 Evaluation
Board PCB Bottom Side.
Test Equipment
1. 6V, 5A laboratory power supply: HP33401A or equivalent.
2. DC 0A to 2.5A load capable of operation down to 1.0V: Keithley 2400 or equivalent.
When using the Keithley 2400, set the meter to zero volts in voltage source mode and set the load cur-
rent by varying the current compliance (maximum current) of the meter.
3. DC voltmeter: HP34401A or equivalent.
4. Oscilloscope:Tektronix TDS744A or equivalent.
Setup and Test
A: Load and Line Regulation (see connection diagram in Figure 4).
1. Apply a DC power supply and DC voltmeter across input voltage terminals V_IN+ (positive terminal) and
GND (negative terminal or return).
2. Apply a DC load and DC voltmeter to output terminals. V_O+ and GND.
3. Vary the load from 0A to 2.5A and the input voltage from 2.7V to 5.5V while monitoring the output voltage.
4. The output voltage as measured at the output terminals of the evaluation board should not vary by more
than ±3% of the nominal voltage.
2
EV-107.2005.01.1.0