ISL8120IRZ-T Intersil, ISL8120IRZ-T Datasheet - Page 32

• Manufacturer Part Number: ISL8120IRZ-T
• Description: IC CTRLR PWM 2/NPHASE 32-QFN
• Manufacturer: Intersil

Specifications of ISL8120IRZ-T

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 1.5MHz
• Duty Cycle: 90%
• Voltage - Supply: 3 V ~ 22 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Frequency-max: 1.5MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 25 shows the tolerance of various output voltage
regulation for 1%, 0.5%, and 0.1% feedback resistor
dividers. Note that the farther the output voltage setpoint
away from the internal reference voltage, the larger the
tolerance; the lower the resistor tolerance (R%), the tighter
the regulation.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
%min
%max
R
R
OSMAX
OSMIN
=
=
(
(
Vref
Vref
=
=
---------------------------------------------------------------------------------------------- -
-------------------------------------- -
R
⋅
---------------------------------------------------------------------------------------------------- -
-----------------------------------------
R
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
⋅
(
OS
(
OS
1 Ref%
1 Ref%
–
–
⋅
⋅
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
(
1
(
1 R
1
1
– %
+
For information regarding Intersil Corporation and its products, see www.intersil.com
R%
)
)
–
)
–
V
+
)
V
32
OS_DA
+
-------------------------------------------------
R
OS_DA
1
--------------------------------------------------- -
R
1
DIF
DIF
⋅
)
(
⋅
)
1 R
⋅
(
⋅
1
⎛
⎜
⎝
–
1
⎛
⎜
⎝
1
1
1
+
+
DIF
+
R
R
--------------------------------------- -
R
--------------------------------------- -
DIF
FB
%
FB
R
R
)
%
OSMAX
⋅
⋅
OSMIN
(
)
(
1 R%
1 R%
–
–
(EQ. 10)
(EQ. 9)
ISL8120IRZEC
)
⎞
⎟
⎠
)
⎞
⎟
⎠
FIGURE 25. OUTPUT REGULATION WITH DIFFERENT
-0.5
-1.0
-1.5
-2.0
-2.5
2.5
2.0
1.5
1.0
0.5
0.0
0.5
1.0
RESISTOR TOLERANCE FOR REF% =
1.5
OUTPUT VOLTAGE (V)
2.0
2.5
3.0
3.5
4.0
R% = 1%
0.5%
0.5%
0.1%
0.1%
1%
4.5
April 21, 2009
±
0.6%
FN6763.1
5.0