ISL6455EVAL1Z Intersil, ISL6455EVAL1Z Datasheet - Page 3

• Manufacturer Part Number: ISL6455EVAL1Z
• Description: EVALUATION BOARD FOR ISL6455
• Manufacturer: Intersil

Specifications of ISL6455EVAL1Z

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 3, Non-Isolated
• Voltage - Output: 1.2V, 1.8V, 2.5V
• Current - Output: 200mA, 200mA, 200mA
• Voltage - Input: 5V
• Regulator Topology: Buck
• Frequency - Switching: 750kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ISL6455
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

What’s Inside
The Evaluation Board Kit contains the following materials:
• The ISL6455 EVAL REVD board
• The ISL6455 datasheet
• This EVAL KIT document
Recommended Equipment
The following materials are recommended to perform
testing:
• 0V to 15V power supply with at least 5A source current
• Two Electronic Loads capable of sinking current up to 5A
• Digital Multimeters (DMMs)
• 100MHz quad-trace Oscilloscope
• Signal generator
Quick Setup Guide
1. Ensure that the circuit is correctly connected to the supply
2. Connect the bias supply to V
3. Turn on the power supply. For the ISL6455, the input
4. Verify the outputs voltages for ISL6455 are 2.5V for
5. Verify the ouputs voltages for ISL6455A are 3.3V for
capability, battery, notebook AC adapter
and loads prior to applying any power.
J1(V
voltage should be 3.3V. For the ISL6455A, the input
voltage should be 5V.
V
V
OUT
OUT
IN
, 1.8V for V
, 2.5V for V
) and the negative return to J2(GND).
OUT1
OUT1
, and 1.2V for V
, and 1.2V for V
3
IN
the plus terminal to
OUT2
OUT2
.
.
Application Note 1327
Evaluating the Other Output Voltage
The ISL6455 EVAL kit outputs are preset to V
V
outputs are preset to V
V
2.5V with ISL6455 (V
ISL6455A (V
Frequency
The ISL6455EVAL1Z and ISL6455AEVAL1Z can operate at
a switching frequency of 750kHZ, however, the switching
frequency can adjust from 500kHz to1MHz by using the sync
pin (P9).
V
V
V
OUT1
OUT2
OUT1
OUT
OUT2
J1
1
2
=
= 1.2V. Output voltages can be adjusted from 0.8V to
= 1.8V, and V
=
=
0.45
---------- - R
Center post to right Connect VIN_LDO to VOUT
Center post to left
R
1.184
-------------- - R
1.184
-------------- - R
2
R
R
6
IN
4
(
VIN_LDO
(
(
TABLE 1. SWITCH 1 SETTINGS
= 5V) using the following equations:
1
+
5
3
R
+
+
2
R
R
OUT2
)
IN
6
4
OUT
)
)
= 3.3V), and from 0.8V to 3.3V with
= 1.2V. The ISL6455A EVAL kit
= 3.3V; V
Connect VIN_LDO to P13
OUT1
= 2.5V and
OUT
= 2.5V;
May 23, 2007
AN1327.0
(EQ. 1)
(EQ. 2)
(EQ. 3)