All other trademarks mentioned are the property of their respective owners.
ISL72991RH
Application Information
Typical User Application:
VIN
VIN
ILIM
SD
GND
VOUT
Capacitor Selection
VOUT
ISL72991RH
ADJ
An input capacitor is required if the regulator is located more
than 6 inches from power supply filter capacitors. A 10µF
solid tantalum capacitor is recommended.
An output capacitor of at least 10µF must be used to insure
stability of the regulator. Additional capacitance may be
added as required to improve the dynamic response of the
regulator. Solid tantalum and/or ceramic capacitors are
recommended.
RCL
CIN
R2
FIGURE 1. TYPICAL APPLICATION SCHEMATIC
R1
CC
COUT
Output Voltage Programming
The output voltage of the regulator can be programmed with
two external resistors and is described by the following
equation: V
OUT
= V
REF
x (1+R2/R1) - (I
ADJ
x R2).
Loop Compensation
The output capacitor and ESR comprise a zero in the loop
transfer function that must be compensated with a pole to
insure loop stability in accordance with the following
equation: C
C
x R2 = C
OUT
x ESR. The compensating
capacitor should be a low ESR ceramic type.
Output Current Limit Programming
The output current limit threshold of the regulator can be
programmed with a single external resistor connected from
I
LIM
to ground. The current flowing into the I
LIM
pin is
described by the following equation: I
LIM
= 1V/(R
CL
+ 2400).
The graph below shows the relationship between I
LIM
and
the output current limit threshold, I
OUT_LIM
.
Layout Guidelines
The stability of the regulator is sensitive to layout. It is
strongly recommended that a continuous copper ground
plane (1 ounce or greater) be used. In addition, component
lead lengths and interconnects should be minimized, but
should not exceed 1/2 inch. Finally, the return lead of the
compensation capacitor (C
C
) should be connected as close
as possible to the GND pin of the IC.
I
OUT_LIM
(A)
I
LIM
(A)
FIGURE 2. I
OUT_LIM
vs I
LIM
2
ISL72991RH
Die Characteristics
DIE DIMENSIONS:
5870µm x 5210µm (231.1mils x 205.1mils)
Thickness: 483µm
±
25.4µm (19mils
±
1mil)
INTERFACE MATERIALS:
Glassivation:
Type: PSG (Phosphorous Silicon Glass)
Thickness: 8.0kÅ
±
1.0kÅ
Top Metallization:
Type: AlSiCu
Thickness: 16.0kÅ
±
2kÅ
Substrate:
Radiation Hardened Silicon Gate,
Dielectric Isolation
Backside Finish:
Silicon
ASSEMBLY RELATED INFORMATION:
Substrate Potential:
Unbiased (DI)
ADDITIONAL INFORMATION:
Worst Case Current Density:
<2.0 x 10
5
A/cm
2
Transistor Count:
Metallization Mask Layout
ISL72991RH
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
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.
For information regarding Intersil Corporation and its products, see www.intersil.com
Is there anyone who does lithium battery balancing? I want to ask: when balancing lithium iron phosphate batteries, can the balancing current be a pulse, with a peak value of 6A? Or does it have to be...
Road vehicles have long been considered one of the most challenging developments. The tight interaction between electrical and mechanical components and the inherent safety requirements of high-speed/...
1. History 50 years ago, people already knew the basic knowledge that semiconductor materials can generate light. In 1962, Nick Holonyak Jr. of General Electric developed the first practical visible l...
[i=s]This post was last edited by wsdymg on 2017-12-16 09:33[/i] Recently, due to project requirements, the leader asked me to develop the Aurix TriCore series controller. There is not much informatio...
Charger requirements continue to evolve with the emergence of innovative applications, emerging technologies and new battery chemistries. For example, new applications in the wearables space, such as ...
I encountered a problem when doing a DHT11 reading experiment, that is, how to determine whether the IO line reads 0? I used #define IO_READ_H PIND |= (1
If you can judge 1, you can judge 0. Think abo...
According to foreign media reports, Ford Motor has applied to the U.S. Patent and Social Security Administration (USPTO) for a patent for a remote vehicle control system that may be used in future ...[Details]
As the main model among new energy vehicles, pure electric vehicles have received strong support and encouragement from the country in recent years, and their development is changing with each pass...[Details]
As time goes by, people are increasingly concerned about their own and their families' health. However, existing monitoring devices for individual vital signs have struggled to gain market share du...[Details]
White light LEDs are voltage-sensitive devices. In actual operation, their upper limit is 20mA. However, the current often increases due to various reasons during use. If no protective measures are...[Details]
The Automotive Testing and Quality Assurance Expo (ATE 2025) will open on August 27th. At the expo, Rohde & Schwarz (R&S) will showcase six automotive testing solutions, themed "Intelligently Drivi...[Details]
In the electronics manufacturing industry, surface mount technology (SMT) placement machines are core equipment for production lines. However, with many different models available on the market, ch...[Details]
Compared to cloud databases, minicomputers are purpose-built for decentralized, rugged computing at the edge of the network. By moving applications, analytics, and processing services closer to the...[Details]
Magna's integrated in-cabin perception system fuses vision and millimeter-wave radar data to detect the presence of passengers, identify stranded children, monitor driver fatigue and vital signs, a...[Details]
The MCX E series is the most reliability- and safety-focused series in NXP's extensive MCX product portfolio.
With the launch of this series, NXP has further enriched its 5V-compatible MCU pr...[Details]
In the period after the switching power supply achieved the "20 kHz" revolution in the 1970s, although improvements and enhancements were made in circuit technology, the development level of the se...[Details]
For new energy vehicles, the importance of batteries is unquestionable. Not only does it determine the performance of the vehicle, but the battery density also has a great relationship with the veh...[Details]
As a pioneer in the new smart home concept, robot vacuums have captured a significant market share. Robot vacuums, also known as automatic sweepers, smart vacuums, or robot vacuums, are smart home ...[Details]
Nascent Micro is launching devices covering a wide range of power applications, including gallium nitride (GaN) drivers, dual-channel automotive drivers, and battery protection MOSFETs.
...[Details]
When American cartoonist Chester Gould sketched the watch on Dick Tracy's wrist, he had no idea that science fiction would become reality 70 years later. As a comic strip artist, Gould imagined fut...[Details]
Compiled from semiengineering
The industry is increasingly concerned about power consumption in AI, but there are no simple solutions. This requires a deep understanding of software and ...[Details]
Integrated technical exchanges
京公网安备 11010802033920号
EEWORLD
