ISL6539 Datasheet, PDF (7/20 Pages) Intersil Corporation – Wide Input Range Dual PWM Controller with DDR Option

ISL6539
V_IN
VCC (5V)
V1 (2.5V)
RFB11
17.8k
CFB1
0.01µ F
CO13
220µF
CIN1
10µF
LO1
4.7µH
CO11
4.7µF
D1
CDC
4.7µF
BAT54W
CB11
0.15µF
RBT1
0Ω
Q1
RS1
2.0k
FDS6912A
VIN VCC
GND
DDR
BOOT1
UGATE1
PHASE1
ISEN1
LGATE1
PGND1
GND
BOOT2
UGATE2
PHASE2
ISEN2
LGATE2
PGND2
GND
D2
BAT54W
RBT2
0Ω
CBT2
0.15µF
CIN2
10µF
LO2
V2 (1.8V)
RS2
Q2
4.7µH
2.0k
CO21 CO22
220µF 4.7µF
FDS6912A
RFB21
10k
CFB2
0.01µF
RFB12
10k
VSEN1
VSEN2
PG1
EN1
PG2
U1
EN2
RFB22
10k
SOFT1
SOFT2
CSOFT1
0.01µF
OCSET1 OCSET2
RSET1
100k
ISL6539
RSET2
100k
CSOFT2
0.01µF
FIGURE 3. TYPICAL APPLICATION CIRCUIT AS DUAL SWITCHER, VOUT1 = 2.5V, VOUT2 = 1.8V
VIN
VCC (5V)
VDDQ (2.5V)
CFB1
0.01µF
CO13
220µF
RFB1
17.8k
CIN1
10µF
LO1
4.6µF
CO11
4.7µF
CDC
4.7µF
D1
BAT54W
VIN
GND
CBT1
0.15µF
RBT1
BOOT1
0Ω
UGATE1
VCC
DDR
BOOT2
UGATE2
PHASE1 PHASE2
Q1
RS1
2.0k ^ISEN1
ISEN2
LGATE1 LGATE2
FDS6912A
PGND1
GND
PGND2
VSEN2
RBT2
0Ω
RS2
1.0k
D2
BAT54W
VDDQ
CBT2
0.15µF
CIN2
4.7µF
LO2
Q2 _1.5µH
VTT (1.25V)
FDS6912A
CO21 CO22
220µF 4.7µF
RFB12
10k
CSOFT1
0.01µF
VSEN1 PG2_REF
VREF (VDDQ/2)
PG1
EN1
U1
SOFT1
GND
CREF
4.7µF
EN2
OCSET2_VDDQ/2
VDDQ
RD1
10k
VDDQ/2
OCSET1
RSET1
SOFT2
CF
CSOFT2 (N/U) ^0.1µF
RD2
10k
100k
ISL6539
0.01µF
FIGURE 4. TYPICAL APPLICATION AS DDR MEMORY POWER SUPPLY, VOUT1 = 2.5V, VOUT2 = 1.25V
7
FN9144.6
April 29, 2010