ISL6539CA-T Intersil, ISL6539CA-T Datasheet - Page 8

• Manufacturer Part Number: ISL6539CA-T
• Description: IC CTRLR DDR DRAM, SDRAM 28QSOP
• Manufacturer: Intersil

Specifications of ISL6539CA-T

• Applications: Controller, DDR DRAM, SDRAM
• Voltage - Input: 3.3 ~ 18 V
• Number Of Outputs: 2
• Voltage - Output: 0.9 ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Block Diagram
SOFT1
ISEN1
BOOT1
UGATE1
PHASE1
PGND1
LGATE1
VCC
VSEN1
OCSET1
140Ω
+ 0.9V
REF
CURRENT
SAMPLE
300kΩ
1/2.9
OCSET1
500kΩ
+
+
-
ADAPTIVE DEAD-TIME
0.9V REFERENCE
DIODE EMULATION
V/I SAMPLE TIMING
-
+
1.25pF
ERROR AMP 1
1MΩ
CURRENT
SAMPLE
ISEN1
1/33.1
4.4kΩ
16.7pF
-
+
-
+
OVERCURRENT FAULT
REQUIRED TO LATCH
SAME STATE FOR
8 CLOCK CYCLES
PGOOD
OV UV
PG1
PWM1
OC1
EN1
DDR
0
1
PWM CHANNEL PHASE CONTROL
DUTY CYCLE RAMP GENERATOR
EN1
1
1
VIN
EN2
1
1
OC1 DDR
BIAS SUPPLIES
FAULT LATCH
REFERENCE
SOFT-START
VCC
DDR MODE
CONTROL
ENABLE
5V
DDR
V
POR
V
IN
IN
GND
VIN
= GND
= 5V
15.0V
OC2
VCC
CH1 CH2 φ
180°
90°
0°
OVERCURRENT FAULT
REQUIRED TO LATCH
EN2
8 CLOCK CYCLES
SAME STATE FOR
DDR = 0
OC2
PWM2
PGOOD
REF/PG2
OV UV
DDR = 1
-
+
-
+
4.4kΩ
16.7pF
CURRENT
1/33.1
ISEN2
SAMPLE
ERROR AMP 2
ADAPTIVE DEAD-TIME
DIODE EMULATION
V/I SAMPLE TIMING
0.9V REFERENCE
1.25pF
1MΩ
BUFFER AMP
DDR VREF
+
-
+
-
500kΩ
-
+
+
OCSET2
(200kΩ, DDR = 1)
1/2.9
300kΩ
CURRENT
SAMPLE
DDR = 0
+
DDR = 0
140Ω
0.9V
REF
REFERENCE
DDR VTT
DDR = 1
UGATE2
PHASE2
OCSET2
LGATE2
BOOT2
PGND2
VSEN2
SOFT2
DDR = 1
+
ISEN2
-
VCC