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ISL9307IRTWCWNEV1Z

更新时间： 2024-11-28 00:42:19
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英特矽尔 - INTERSIL /
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13页 378K
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3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs

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3MHz Dual 1500mA Step-Down Converters and Dual  
Low-Input LDOs  
ISL9307  
Features  
The ISL9307 is an integrated mini Power Management IC  
(mini-PMIC) ideal for applications for powering low-voltage  
microprocessor or multiple voltage rails with a battery as an  
input source, such as a single Li-ion or Li-polymer. ISL9307  
integrates two high-efficiency, 3MHz, synchronous step-down  
converters (DCD1 and DCD2) and two low-input, low-dropout  
linear regulators (LDO1 and LDO2).  
• Dual 1500mA, Synchronous Step-down Converters and Dual  
300mA, General-purpose LDOs  
• Input Voltage Range  
- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V  
- VINLDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V  
• Adjustable Output Voltage  
- VODCD1/VODCD2 . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to V  
IN  
The 3MHz PWM switching frequency allows the use of very  
small external inductors and capacitors. Both step-down  
converters can enter skip mode under light load conditions to  
further improve efficiency and maximize battery life.  
• 50μA I (Typ) with DCD1/DCD2 in Skip Mode; 20μA I (Typ)  
Q
Q
for each Enabled LDO  
• EN Pins for DCD1/DCD2 and LDO1/LDO2  
• Small, Thin, 4mmx4mm TQFN  
The ISL9307 features EN pins for each channel, thus allowing  
startup delay for power sequencing.  
Applications  
The ISL9307 also provides two 300mA low-dropout (LDO)  
regulators. The input voltage range is 1.5V to 5.5V, which  
allows them to be powered from one of the on-chip step-down  
converters or directly from a battery. The default LDO power-up  
output comes with factory pre-set fixed output voltage options  
between 0.9V and 3.3V.  
• Cellular Phones, Smart Phones  
• PDAs, Portable Media Players, Portable Instruments  
• Single Li-ion/Li-polymer Battery-Powered Equipment  
• DSP Core Power  
The ISL9307 is available in a 4mmx4mm 16 Ld TQFN.  
L1 = 1.5µH  
2.5V TO 5.5V  
VINDCD1  
SW1  
FB1  
1500mA  
VINDCD2  
C1  
R1  
C4  
10µF  
10µF  
R2  
ENDCD1  
ENDCD2  
L2 = 1.5µH  
SW2  
FB2  
1500mA  
ISL9307  
C5  
10µF  
R3  
ENLDO1  
R4  
ENLDO2  
1.5V TO 5.5V  
VINLDO  
C2  
VOLDO1  
VOLDO2  
300mA  
300mA  
1µF  
C6  
1µF  
C7  
1µF  
GNDDCD1  
GNDDCD2  
GNDLDO  
NOTE: ONLY FOR ADJUSTABLE OUTPUT VERSION. FOR FIXED  
OUTPUT VERSION, DIRECTLY CONNECT THE FB PIN TO THE  
OUTPUT OF THE BUCK CONVERTER.  
FIGURE 1. TYPICAL APPLICATION DIAGRAM  
September 20, 2012  
FN7931.3  
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. 2012. 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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