ISL6530/31EVAL1 INTERSIL [Intersil Corporation], ISL6530/31EVAL1 Datasheet - Page 15

• Manufacturer Part Number: ISL6530/31EVAL1
• Description: Dual 5V Synchronous Buck Pulse-Width Modulator (PWM) Controller for DDRAM Memory VDDQ and VTT Termination
• Manufacturer: INTERSIL [Intersil Corporation]

ISL6531 DC-DC Converter Application Circuit
Figure 11 shows an application circuit for a DDR SDRAM
power supply, including V
Detailed information on the circuit, including a complete
Billof-Materials and circuit board description, can be found
Component Selection Notes:
C4,5,7,8,9,10,18,19 - Each 150mF, Panasonic EEF-UE0J151R
D1,2 - Each 30mA Schottky Diode, MA732
1.43kΩ
6.34kΩ
R
R
26
20
5600pF
C
C
15000pF
26
100pF
3.01kΩ
25
100Ω
R
25
C
R
100pF
27
C
DDQ
19
30
15
(+2.5V) and V
V2_SD
PGOOD
VREF
VREF_IN
GNDA
COMP1
FB1
3.48kΩ
FIGURE 11. DDR SDRAM VOLTAGE REGULATOR
SENSE1
R
OCSET/SD
TT
1
(+1.25V).
ISL6531
+5V
1000pF
C
SENSE2
1
ISL6531
VCC
PHASE1
PHASE2
UGATE1
UGATE2
LGATE1
LGATE2
BOOT1
PGND1
BOOT2
PGND2
PVCC1
inApplication Note AN9993-of-Materials and circuit board
description, can be found in Application Note AN9993
Application Note AN9993-of-Materials and circuit board
description, can be found in Application Note AN9993.
L1,2 - Each 1mH Inductor, Panasonic P/N ETQ-P6F1ROSFA
Q1,2 - Each Fairchild MOSFET; ITF86130DK8
Q3 - Fairchild MOSFET; ITF86110DK8
C
0.1µF
2
C
0.1µF
D
16
2
D
1
C
0.1µF
15
C
0.1µF
6
Q
1µH
3
L
2
Q
Q
2
1
C
1.0µF
1µH
L
17
1
1.0µF
C
3
C
150µF(x2)
4,5
150µF(x4)
C
C
150µF(x2)
7,8,9,10
18,19
V
@10A
V
@5A
DDQ
TT