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PDF ISL8240M Data sheet ( Hoja de datos )
| Número de pieza | ISL8240M | |
| Descripción | Dual 20A/Single 40A Step-Down Power Module | |
| Fabricantes | Intersil Corporation | |
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Dual 20A/Single 40A Step-Down Power Module
ISL8240M
The ISL8240M is a fully-encapsulated step-down switching
power supply that can deliver up to 100W output power from a
small 17mmx17mm PCB footprint. The two 20A outputs may
be used independently or combined to deliver a single output
of 40A. Designing a high-performance board-mounted power
supply has never been simpler -- only a few external
components are needed to create a very dense and reliable
power solution.
1.5% output voltage accuracy, differential remote voltage
sensing and fast transient response create a very
high-performance power system. Built-in output overvoltage,
overcurrent and over-temperature protection enhance system
reliability.
The ISL8240M is available in a thermally-enhanced QFN
package. Excellent efficiency and low thermal resistance
permit full power operation without heat sinks or fans. In
addition, the QFN package with external leads permits easy
probing and visual solder inspection.
Related Literature
AN1922, “ISL8240MEVAL4Z Dual 20A/Optional 40A
Cascadable Evaluation Board Setup Procedure”
AN1923, “ISL8240MEVAL3Z 40A, Single Output Evaluation
Board Setup Procedure”
Features
• Fully-encapsulated dual step-down switching power supply
• Up to 100W output from a 17mmx17mm PCB footprint
• Dual 20A or single 40A output
• Up to 94% conversion efficiency
• 4.5V to 20V input voltage range
• 0.6V to 2.5V output voltage range
• 1.5% output voltage accuracy with differential remote
sensing
• Output overvoltage, overcurrent and over-temperature
protection
• QFN package with exposed leads permits easy probing and
visual solder inspection
Applications
• Computing, networking and telecom infrastructure
equipment
• Industrial and medical equipment
• General purpose point-of-load (POL) power
4.5V TO 20V
VIN
5x22μF
OFF ON
4.7μF
RSYNC
237k
VIN1
VOUT1
VIN2
VOUT2
EN/FF1
VSEN1+ RSET
EN/FF2
VSEN1- 1.5kΩ
VSEN2- ISL8240M VMON1
1.0Vat 40A
VOUT
1kΩ
9x100μF
VCC
SYNC
VMON2
COMP1
COMP2
470pF
NOTE: All pins not shown are floating
FIGURE 1. COMPLETE 40A STEP-DOWN POWER SUPPLY
17mm
17mm
7.5mm
FIGURE 2. SMALL FOOTPRINT WITH HIGH POWER DENSITY
May 23, 2014
FN8 450. 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. 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.
http://www.Datasheet4U.com
1 page  
Pin Configuration
9
PHASE2
10
N/C 11
PHASE1
12
13
ISL8240M
ISL8240M
(26 LD QFN)
TOP VIEW
PIN 1
8 7 6 543 2
1 VSEN2-
26 VSEN2+
25 VOUT2
24 PGOOD
23 VOUT1
22 VSEN1+
21 VSEN1-
14 15 16 17 18 19 20
Submit Document Feedback
5
FN8450.1
May 23, 2014
5 Page 
ISL8240M
Typical Performance Characteristics (Continued)
100 92
95
2.5VOUT 700kHz
1.8VOUT 650kHz
90
85
80
1VOUT 500kHz
1.2VOUT 550kHz
1.5VOUT 700kHz
75
70
65
60
0 5 10 15 20 25 30 35 40
91
90
89
88
87
86
85
84
83
350
2.5VOUT
1.8VOUT
1.5VOUT
1VOUT
400 450
1.2VOUT
500 550 600
650
700
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
FIGURE 9. EFFICIENCY vs LOAD CURRENT (PARALLEL SINGLE
OUTPUT, AS SHOWN IN Figure 24 AT 12VIN)
FIGURE 10. EFFICIENCY vs SWITCHING FREQUENCY AT VIN = 12V
(PARALLEL SINGLE OUTPUT, AS SHOWN IN Figure 24 AT
12VIN) AND IOUT = 18A FOR VARIOUS OUTPUT
VOLTAGES
Transient Response Performance VIN = 12V current slew rate = 10A/μs. TA = +25°C, if not specified, as shown in Figure 23 with
2nd phase disabled.
100mV/DIV
100mV/DIV
100μs/DIV
FIGURE 11. 1VOUT TRANSIENT RESPONSE, IOUT = 0A TO 10A,
FSW = 350kHz, COUT = 2x10μF + 7x100μF CERAMIC
CAPACITOR, CFF = 6.8nF
100μs/DIV
FIGURE 12. 1.5VOUT TRANSIENT RESPONSE, IOUT = 0A TO 10A,
FSW = 400kHz, COUT = 2x10μF + 7x100μF CERAMIC
CAPACITOR, CFF = 6.8nF
100mV/DIV
100mV/DIV
100μs/DIV
FIGURE 13. 1.8VOUT TRANSIENT RESPONSE, IOUT = 0A TO 10A,
FSW = 450kHz, COUT = 2x10μF + 7x100μF CERAMIC
CAPACITOR, CFF = 6.8nF
Submit Document Feedback 11
100μs/DIV
FIGURE 14. 2.5VOUT TRANSIENT RESPONSE, IOUT = 0A TO 10A,
FSW = 500kHz, COUT = 2x10μF + 7x100μF CERAMIC
CAPACITOR, CFF = 6.8nF
FN8450.1
May 23, 2014
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL8240M.PDF ] | |
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