AATIAN27 Datasheet, PDF (2/4 Pages) SiGe Semiconductor, Inc. – 1MHz 3A Buck DC/DC Switch Mode Regulator

EV-104
AAT1154EVAL
1MHz 3A Buck DC/DC Switch Mode Regulator
Specification
Input Voltage
Output Error Voltage
Output Current
Test Conditions
Min
Typ
2.7
3.6
±3
0
Table 1: AAT1154 Evaluation Board Specifications.
Max
5.5
3.0
Units
V
%
A
Figure 2: AAT1154 Evaluation
Board PCB Top Side.
Figure 3: AAT1154 Evaluation
Board PCB Bottom Side.
Test Equipment
1. 6.0V 10A laboratory power supply: HP33401A or equivalent.
2. DC 0A to 3.0A 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. _VO+ and GND.
3. Vary the load from 0 to 3.0A 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.
B: Short-Circuit and Over-Temperature Protection
1. Raise the input voltage to 5.5V.
2. Apply a short from V_O+ to GND at the evaluation board terminals.
3. Remove the short and verify that output returns to its initial value.
2
EV-104.2005.01.1.0