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EL7531

更新时间： 2023-12-20 18:44:50
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瑞萨 - RENESAS /
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12页 744K
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Monolithic 1A Step-Down Regulator with Low Quiescent Current

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DATASHEET  
EL7531  
FN7428  
Rev 10.00  
December 10, 2015  
Monolithic 1A Step-Down Regulator with Low Quiescent Current  
The EL7531 is a synchronous, integrated FET 1A step-down  
Features  
regulator with internal compensation. It operates with an input  
voltage range from 2.5V to 5.5V, which accommodates  
supplies of 3.3V, 5V, or a Li-Ion battery source. The output can  
2
2
• Less than 0.15 in (0.97 cm ) footprint for the complete 1A  
converter  
be externally set from 0.8V to V with a resistive divider.  
IN  
• Components on one side of PCB  
• Max height 1.1mm MSOP10  
The EL7531 features automatic PFM/PWM mode control, or  
PWM mode only. The PWM frequency is typically 1.4MHz  
and can be synchronized up to 12MHz. The typical no load  
quiescent current is only 120µA. Additional features include  
a Power-Good output, <1µA shut-down current, short-circuit  
protection, and over-temperature protection.  
• Power-Good (PG) output  
• Internally-compensated voltage mode controller  
• Up to 94% efficiency  
• <1µA shut-down current  
The EL7531 is available in the 10 Ld MSOP package,  
making the entire converter occupy less than 0.15 in of  
• 120µA quiescent current  
2
• Overcurrent and over-temperature protection  
• External synchronizable up to 12MHz  
• Pb-Free plus anneal available (RoHS compliant)  
PCB area with components on one side only. The 10 Ld  
MSOP package is specified for operation over the full -40°C  
to +85°C temperature range.  
Ordering Information  
Applications  
PART  
TAPE &  
REEL  
PKG.  
DWG. #  
• PDA and pocket PC computers  
• Bar code readers  
PART NUMBER MARKING  
PACKAGE  
EL7531IYZ  
(Note)  
BHAAA  
-
10 Ld MSOP  
(Pb-free)  
M10.118A  
M10.118A  
M10.118A  
• Cellular phones  
EL7531IYZ-T7  
(Note)  
BHAAA  
7”  
10 Ld MSOP  
(Pb-free)  
• Portable test equipment  
• Li-Ion battery powered devices  
• Small form factor (SFP) modules  
EL7531IYZ-T13 BHAAA  
(Note)  
13”  
10 Ld MSOP  
(Pb-free)  
NOTE: Intersil Pb-free plus anneal products employ special Pb-free  
material sets; molding compounds/die attach materials and 100% matte  
tin plate termination finish, which are RoHS compliant and compatible  
with both SnPb and Pb-free soldering operations. Intersil Pb-free  
products are MSL classified at Pb-free peak reflow temperatures that  
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.  
Typical Application Diagram  
V
V
(2.5V to 5.5V)  
L
1
O
S
VIN  
LX  
1.8µH  
R
100  
3
C
10µF  
1
VDD  
C
10µF  
C
3
0.1µF  
Pinout  
2
EL7531  
EL7531 (10 LD MSOP)  
TOP VIEW  
R
R
100k  
5
4
R *  
1
124k  
PG  
EN  
SGND  
PGND  
LX  
FB  
VO  
1
2
3
4
5
10  
9
C
4
FB  
VO  
470pF  
100k  
SYNC  
R *  
2
100k  
PG  
8
R
6
100k  
PGND  
SGND  
VIN  
EN  
7
(1.8V @ 1A)  
6
VDD  
SYNC  
* V = 0.8V * (1 + R / R )  
O
1
2
FN7428 Rev 10.00  
December 10, 2015  
Page 1 of 12  
1234567...12

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