ISL62391HIEVAL1Z Intersil, ISL62391HIEVAL1Z Datasheet - Page 2

• Manufacturer Part Number: ISL62391HIEVAL1Z
• Description: EVALUATION BOARD FOR ISL62391HI
• Manufacturer: Intersil
• Series: Robust Ripple Regulator™ (R³)r

Specifications of ISL62391HIEVAL1Z

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 3, Non-Isolated
• Voltage - Output: 1.05V, 1.5V, 3.3V
• Current - Output: 15A, 15A, 100mA
• Voltage - Input: 5.5 ~ 25V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: ISL62391
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -

Take Channel-1 as an example, once the value of R
is calculated, follow the following procedure to configure the
resistor current sense circuit:
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Connections and Test Points
INTERFACES AND CONNECTIONS
TEST POINTS
POWER-GOOD INDICATOR
LINEAR REGULATOR
SWITCHES
NUMBER
TP11
TP12
TP14
TP15
TP13
TP10
SW1
SW2
TP3
TP4
TP1
TP2
TP8
TP9
TP5
TP6
TP7
D1
U2
J3
J6
J2
J5
J4
J7
J1
Open the “DCR SENSE” solder bridge and
connect the “RESISTOR SENSE” solder bridge
on the PCB bottom layer;
Remove R
Replace R
Replace C
Replace replace R
R
OCSET.
FLOAT_FCCM
FLOAT_EN1
FLOAT_EN2
LDO3EN
PHASE1
PHASE2
PGOOD
VOUT1
VOUT2
VOUT1
VOUT2
NAME
FCCM
VBAT
LDO3
+12V
GND
GND
GND
GND
GND
EN1
EN2
3
6
7
(R
(C
(R
25
25
22
for Channel-2) with R
for Channel-2) with R
for Channel-2);
V
V
Channel-1 positive power output
Channel-1 return power output
Channel-2 positive power output
Channel-2 return power output
+12V positive power input, used for the power supply of the on-board dynamic-load generator
+12V return power input
Scope-probe socket for measuring Channel-1 phase node
Scope-probe socket for measuring Channel-2 phase node
Scope-probe socket for measuring Channel-1 output
Scope-probe socket for measuring Channel-2 output
Remove the jumper will float the FCCM pin
Remove the jumper will float the EN1 pin
Remove the jumper will float the EN2 pin
Test point of EN1 pin
Test point of EN2 pin
Test point of LDO3EN pin
Test point of FCCM pin
Test point of PGOOD pin
Power-Good indicator. Green when VOUT1 and VOUT2 are both in regulation.
LDO3 linear regulator positive power output
LDO3 linear regulator return power output
ON/OFF control of channel-2 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle to OFF
will disable the transient load
ON/OFF control of channel-1 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle OFF will
disable the transient load
ON: High level for EN1, EN2, LDO3EN and FCCM, respectively
OFF: Low level for EN1, EN2, LDO3EN and FCCM, respectively
19
IN
IN
2
(R
positive power input
return power input
18
for Channel-2) with
The following table describes the function and operation of the evaluation boards.
Application Note 1397
OCSET;
SENSE
OCSET
;
FUNCTION/OPERATION
Dynamic Load Generator
The evaluation board provides each PWM channel an
on-board dynamic load generator for evaluating the
transient-load response, which are controlled by SW1 and
SW2 respectively. The dynamic load generator applies a
300µs pulse load across V
slew-rate can be trimmed by adjusting the resistors R
for the rising edge, and R
power supply is needed to power the dynamic load
generator.
29
OUT
, R
35
and GND. The transient load
for the falling edge. A +12V
July 31, 2008
28
AN1397.0
, R
34