ISL6225CAZ-T Intersil, ISL6225CAZ-T Datasheet - Page 7

• Manufacturer Part Number: ISL6225CAZ-T
• Description: IC CTRLR DDR DRAM, SDRAM 28QSOP
• Manufacturer: Intersil

Specifications of ISL6225CAZ-T

• Applications: Controller, DDR DRAM, SDRAM
• Voltage - Input: 5 ~ 24 V
• Number Of Outputs: 2
• Voltage - Output: 0.9 ~ 5.5 V
• Operating Temperature: -10°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block Diagram
ISEN1
BOOT1
UGATE1
PHASE1
PGND1
LGATE1
VCC
VSEN1
OCSET1
HYSTERETIC COMPARATOR 1
MODE CHANGE COMP 1
100Ω
+
CURRENT
SAMPLE
0.9V REFERENCE
300kΩ
OCSET1
1/3
500kΩ
+
PWM/HYS TRANSITION
ADAPTIVE DEAD-TIME
0.9V REFERENCE
V/I SAMPLE TIMING
DIODE EMULATION
+
-
+
+
-
-
-
+
REQUIRED TO CHANGE
PWM OR HYS MODE
1.3pF
SAME STATE FOR
8 CLOCK CYCLES
1MΩ
ERROR AMP 1
∆V
CURRENT
ISEN1
1/32
SAMPLE
HYS
=15mV
15.2pF
Σ
SOFT1
VOLTS/SEC
+
-
+
-
OVER-CURRENT FAULT
CLAMP
REQUIRED TO LATCH
SAME STATE FOR
8 CLOCK CYCLES
PGOOD
OV UV
PG1
PWM1
DDR EN1 EN2
OC1
EN1
0
1
VOUT1
1
1
DUTY CYCLE RAMP GENERATOR
PWM CHANNEL PHASE CONTROL
1
1
VIN
OC1 DDR
BIAS SUPPLIES
FAULT LATCH
4.2 < VIN < 24.0V
REFERENCE
SOFT-START
VCC
DDR MODE
CONTROL
VIN to GND
ENABLE
0 ⇔ 24.0V
DDR
POR
GND
VIN
OC2
VCC
VOUT2
CH1 CH2 φ
OVER-CURRENT FAULT
REQUIRED TO LATCH
1 80º
SAME STATE FOR
90º
8 CLOCK CYCLES
0º
EN2
OC2
DDR=0
PWM2
PGOOD
REF/PG2
OV UV
VOLTS/SEC
CLAMP
DDR=1
-
+
+
-
SOFT2
REQUIRED TO CHANGE
Σ
PWM OR HYS MODE
SAME STATE FOR
15.2pF
8 CLOCK CYCLES
∆V
CURRENT
ERROR AMP 2
SAMPLE
HYS
PWM/HYS TRANSITION
ADAPTIVE DEAD-TIME
DIODE EMULATION
V/I SAMPLE TIMING
ISEN2
=15mV
1/32
0.9V REFERENCE
1.3pF
1MΩ
BUFFER AMP
DDR VREF
0.9V REFERENCE
+
+
+
-
-
+
-
-
+
-
HYSTERETIC COMPARATOR 2
500kΩ
MODE CHANGE COMP 2
+
OCSET2
1/3
300kΩ
CURRENT
SAMPLE
+
DDR=0
DDR=0
100Ω
REFERENCE
DDR VTT
UGATE2
PHASE2
OCSET2
DDR=1
LGATE2
BOOT2
PGND2
VSEN2
+
DDR=1
ISEN2
-
VCC