ISL6523EVAL1 Intersil, ISL6523EVAL1 Datasheet - Page 5

• Manufacturer Part Number: ISL6523EVAL1
• Description: EVALUATION BOARD VRM8.5 ISL6523
• Manufacturer: Intersil

Specifications of ISL6523EVAL1

• Main Purpose: Special Purpose DC/DC, VRM Supply
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 1.05 ~ 1.825V, 1.2V, 1.5V, 1.8V
• Current - Output: 14A, 4A, 1A, 1A
• Voltage - Input: 3.3V, 5V, 12V
• Regulator Topology: Buck
• Frequency - Switching: 200kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ISL6523
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

Electrical Specifications
NOTE:
Typical Performance Curve
Functional Pin Descriptions
VCC (Pin 28)
Provide a 12V bias supply for the IC to this pin. This pin also
provides the gate bias charge for all the MOSFETs
controlled by the IC. The voltage at this pin is monitored for
Power-On Reset (POR) purposes.
GND (Pin 17)
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
UGATE1,2 Sink
LGATE Source
LGATE Sink
PROTECTION
OCSET1,2 Current Source
Soft-Start Current
POWER GOOD
VSEN1 Upper Threshold
(VSEN1/DACOUT)
VSEN1 Under-Voltage
(VSEN1/DACOUT)
VSEN1 Hysteresis (VSEN1/DACOUT)
PGOOD Voltage Low
VSEN2 Under-Voltage
VSEN2 Hysteresis
VTTPG Voltage Low
2. Guaranteed by design
140
120
100
80
60
40
20
FIGURE 4. BIAS SUPPLY CURRENT vs FREQUENCY
0
100
C
V
V
UGATE1
IN
CC
200
= 5V
= 12V
PARAMETER
= C
300
UGATE2
SWITCHING FREQUENCY (kHz)
400
= C
500
LGATE1
5
Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)
600
= C
700
SYMBOL
V
R
I
R
V
I
I
SS13,24
OCSET
PGOOD
LGATE
VTTPG
UGATE
LGATE
800
C = 1500pF
C = 660pF
C = 4800pF
C = 3600pF
900
V
VCC = 12V, V
V
V
V
VSEN1 Rising
VSEN1 Rising
VSEN1 Falling
I
VSEN2 Rising
VSEN2 Falling
I
PGOOD
VTTPG
GATE-PHASE
LGATE
OCSET
SS13,24
1000
ISL6523
= -4mA
= 1V
= -4mA
= 4.5V
= 2.0V
TEST CONDITIONS
LGATE1
= 1V
DC
PGND (Pin 24)
This is the power ground connection. Tie the synchronous
PWM converter’s lower MOSFET source to this pin.
VAUX (Pin 16)
Connect this pin to the ATX 3.3V output. The voltage present
at this pin is monitored for sequencing purposes. This pin
provides the necessary base bias for the NPN pass
transistors, as well as the current sunk through the 5kΩ VID
pull-up resistors.
SS13 (Pin 13)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 28µA current source, sets the
soft-start interval of the synchronous switching converter
(V
signal is also delayed by the time interval required by the
charging of this capacitor from 0V to 1.25V (see Soft-Start
details).
SS24 (Pin 12)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 28µA current source, sets the
soft-start interval of the standard buck converter. Pulling this
pin below 0.8V induces a chip reset (POR) and shutdown.
VTTPG (Pin 9)
VTTPG is an open collector output used to indicate the
status of the standard buck regulator output voltage. This pin
is pulled low when the output is below the under-voltage
threshold or when the SS13 pin is below 1.25V.
DC
OUT1
= 1V
) and the AGP regulator (V
MIN
170
108
92
-
-
-
-
-
-
-
-
OUT3
TYP
1.00
200
1.7
1.4
28
60
1
2
-
-
-
-
). A VTTPG high
MAX
230
110
3.5
3.0
0.8
0.8
94
-
-
-
-
UNITS
mV
µA
µA
%
%
%
Ω
A
Ω
V
V
V