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ISL95874 の電気的特性と機能

ISL95874のメーカーはIntersilです、この部品の機能は「(ISL95874 - ISL95876) PWM DC/DC Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL95874
部品説明 (ISL95874 - ISL95876) PWM DC/DC Controller
メーカ Intersil
ロゴ Intersil ロゴ 




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ISL95874 Datasheet, ISL95874 PDF,ピン配置, 機能
PWM DC/DC Controller with VID Inputs for Portable
GPU Core-Voltage Regulator
ISL95874, ISL95875, ISL95876
The ISL95874, ISL95875, ISL95876 ICs are Single-Phase
Synchronous-Buck PWM regulators featuring Intersil’s
proprietary R4 Technology™. The wide 3.3V to 25V input voltage
range is ideal for systems that run on battery or AC-adapter
power sources. The ISL95875 and ISL95876 are low-cost
solutions for applications requiring dynamically selected
slew-rate controlled output voltages. The soft-start and dynamic
setpoint slew-rates are capacitor programmed. Voltage
identification logic-inputs select four (ISL95875, ISL95876)
resistor-programmed setpoint reference voltages that directly set
the output voltage of the converter between 0.5V and 1.5V, and
up to 5V with a feedback voltage divider.
Compared with R3 modulator, the R4 modulator has equivalent
light-load efficiency, faster transient performance, accurately
regulated frequency control and all internal compensation. These
updates, together with integrated MOSFET drivers and Schottky
bootstrap diode, allow for a high-performance regulator that is
highly compact and needs few external components. The
differential remote sensing for output voltage and selectable
switching frequency are another two new functions. For
maximum efficiency, the converter automatically enters
diode-emulation mode (DEM) during light-load conditions such as
system standby.
Features
• Input Voltage Range: 3.3V to 25V
• Output Voltage Range: 0.5V to 5V
• Precision Regulation
- Proprietary R4™ Frequency Control Loop
- ±0.5% System Accuracy Over -10°C to +100°C
• Optimal Transient Response
- Intersil’s R4™ Modulator Technology
• Output Remote Sense
• Extremely Flexible Output Voltage Programmability
- 2-Bit VID Selects Four Independent Setpoint Voltages for
ISL95875 and ISL95876
- Simple Resistor Programming of Setpoint Voltages
• Selectable 300kHz, 500kHz, 600kHz or 1MHz PWM Frequency
in Continuous Conduction
• Automatic Diode Emulation Mode for Highest Efficiency
• Power-Good Monitor for Soft-Start and Fault Detection
Applications
• Mobile PC Graphical Processing Unit VCC Rail
• Mobile PC I/O Controller Hub (ICH) VCC Rail
• Mobile PC Memory Controller Hub (GMCH) VCC Rail
RVCC
+5V
CPVCC
CVCC
RTN1 RFB1
GPIO
1
GND
2 RTN
3 EN
4
SREF
BOOT
UGATE
PHASE
PGOOD
12
11
10
9
CBOOT
QHS
QLS
LO
CSEN
VIN
3.3V TO 25V
CIN
VOUT
0.5V TO 3.3V
CO
RTN1
RO
ROFS
RFB
0
FIGURE 1. ISL95874 APPLICATION SCHEMATIC WITH ONE OUTPUT VOLTAGE SETPOINT AND DCR CURRENT SENSE
October 21, 2011
FN7933.0
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 Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the propertyForefethDeaitrarsehsepeet chttitvpe://owwwnwe.drsa.tasheet4u.com/

1 Page





ISL95874 pdf, ピン配列
ISL95874, ISL95875, ISL95876
Application Schematics: ISL95875
RVCC
+5V
RFB1
RTN1
CPVCC
GPIO
PGND
GND
RTN
VID1
VID0
SREF
SET0
SET1
2
3
4
5
6
7
8
9
RSET1 RSET2 RSET3
VCC
19
BOOT
18
UGATE
17
PHASE
16
EN
15
PGOOD
14
FSEL
13
VO
12
CVCC
CBOOT
ROFS
QHS
QLS
RFB
LO
CSEN
RO
VIN
3.3V TO 25V
CIN
VOUT
0.5V TO 5V
CO
RTN1
0
FIGURE 4. ISL95875 APPLICATION SCHEMATIC WITH FOUR OUTPUT VOLTAGE SETPOINTS AND DCR CURRENT SENSE
RVCC
+5V
RFB1
RTN1
CPVCC
GPIO
PGND
GND
RTN
VID1
VID0
SREF
SET0
SET1
2
3
4
5
6
7
8
9
VCC
19
BOOT
18
UGATE
17
PHASE
16
EN
15
PGOOD
14
FSEL
13
VO
12
CVCC
CBOOT
QHS
LO
QLS
VIN
3.3V TO 25V
CIN
RSEN
CSEN
RO
VOUT
0.5V TO 5V
CO
RTN1
RSET1 RSET2 RSET3
RFB
ROFS
0
FIGURE 5. ISL95875 APPLICATION SCHEMATIC WITH FOUR OUTPUT VOLTAGE SETPOINTS AND RESISTOR CURRENT SENSE
3 FN7933.0
October 21, 2011


3Pages


ISL95874 電子部品, 半導体
ISL95874, ISL95875, ISL95876
Pin Configurations
ISL95874
(16 LD 2.6X1.8 UTQFN)
TOP VIEW
ISL95875
(20 LD 3.2X1.8 UTQFN)
TOP VIEW
GND 1
RTN 2
EN 3
SREF 4
12 BOOT
11 UGATE
10 PHASE
9 PGOOD
PGND 2
GND 3
RTN 4
VID1 5
VID0 6
SREF 7
SET0 8
SET1 9
19 VCC
18 BOOT
17 UGATE
16 PHASE
15 EN
14 PGOOD
13 FSEL
12 VO
ISL95876
(20 LD 3X4 QFN)
TOP VIEW
RTN 1
VID1 2
VID0 3
SREF 4
SET0 5
SET1 6
16 BOOT
15 UGATE
GND
14 PHASE
13 EN
12 PGOOD
11 FSEL
6 FN7933.0
October 21, 2011

6 Page



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共有リンク

Link :


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