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ISL78201 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL78201
部品説明 40V 2.5A Regulator
メーカ Intersil
ロゴ Intersil ロゴ 



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ISL78201 Datasheet, ISL78201 PDF,ピン配置, 機能
DATASHEET
40V 2.5A Regulator with Integrated High-side MOSFET
for Synchronous Buck or Boost Buck Converter
ISL78201
The ISL78201 is an AEC-Q100 qualified 40V, 2.5A synchronous
buck or boost buck controller with a high-side MOSFET and
low-side driver integrated. In buck mode, the ISL78201 supports
a wide input range of 3V to 40V. In boost-buck mode, the input
range can be extended down to 2.5V and output regulation can be
maintained when VIN drops below VOUT, enabling sensitive
electronics to remain on during cold-cranking and start-stop
applications.
The ISL78201 has a flexible selection of operation modes
including forced PWM mode and an optional switch to PFM mode
for light loads. In PFM mode, the quiescent input current is as low
as 300µA and can be further reduced to 180µA with AUXVCC
connected to VOUT under 12V VIN and 5V VOUT application. The
load boundary between PFM and PWM can be programmed to
cover wide applications.
The low-side driver can be either used to drive an external low-side
MOSFET for a synchronous buck, or left unused for a standard
non-synchronous buck. The low-side driver can also be used to
drive a boost converter as a pre-regulator that greatly expands the
operating input voltage range down to 2.5V or lower (refer to
“Typical Application Schematic III - Boost Buck Converters” on
page 5).
The ISL78201 offers the most robust current protections. It uses
peak current mode control with cycle-by-cycle current limiting. It is
implemented with frequency foldback undercurrent limit
condition; in addition, the hiccup overcurrent mode is also
implemented to guarantee reliable operations under harsh short
conditions. The ISL78201 has comprehensive protections against
various faults including overvoltage and over-temperature
protections, etc.
Features
• Buck Mode: input voltage range 3V to 40V (refer to “Input
Voltage” on page 15 for more details)
• Boost mode expands operating input voltage lower than 2.5V
(refer to “Input Voltage” on page 15 for more details)
• Selectable forced PWM mode or PFM mode
• 300µA IC quiescent current (PFM, no load); 180µA input
quiescent current (PFM, no load, VOUT tied to AUXVCC)
• Less than 5µA (MAX) shutdown input current (IC disabled)
• Operational topologies
- Synchronous buck
- Non-synchronous buck
- Two stage boost buck
- Non-inverting single inductor buck boost
• Programmable frequency from 200kHz - 2.2MHz and
frequency synchronization capability
±1% Tight voltage regulation accuracy
• Reliable cycle-by-cycle overcurrent protection
- Temperature compensated current sense
- Programmable OC limit
- Frequency foldback and hiccup mode protection
• 20 Ld HTSSOP package
• AEC-Q100 qualified
• Pb-free (RoHS compliant)
Applications
Automotive applications
• General purpose power regulator
• 24V Bus power
• Battery power
• Embedded processor and I/O supplies
PGOOD
EN
MODE
SYNC
AUXVCC
VIN
BOOT
VCC
ILIMIT
SS
ISL78201 PHASE
LGATE
EXT_BOOST
FS
SGND
PGND
FB
COMP
VIN
VOUT
FIGURE 1. TYPICAL APPLICATION
100
95 6V VIN
90
85 12V VIN
80
75 40V VIN
70 24V VIN
65
60
55
50
0.1m
1m
10m
100m
1 2.5
LOAD CURRENT (A)
FIGURE 2. EFFICIENCY, SYNCHRONOUS BUCK, PFM MODE,
VOUT 5V, TA = +25°C
March 31, 2015
FN8615.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2014, 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.

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