參數(shù)資料
型號： ISL9305IRTWLNCZ-T
廠商： Intersil
文件頁數(shù)： 1/17頁
文件大?。?/td> 771K
描述： IC REG QD BUCK/LINEAR 16TQFN
產(chǎn)品培訓(xùn)模塊： Patient Monitoring and Diagnostic Equipment Solutions
標(biāo)準(zhǔn)包裝： 6,000
拓?fù)洌?/td> 降壓（降壓）（2），線性（LDO）（2）
功能： 任何功能
輸出數(shù)： 4
頻率 - 開關(guān)： 3MHz
電壓/電流 - 輸出 1： 0.8 V ~ 5.5 V，800mA
電壓/電流 - 輸出 2： 0.8 V ~ 5.5 V，800mA
電壓/電流 - 輸出 3： 0.9 V ~ 3.3 V，350mA
帶 LED 驅(qū)動器： 無
帶監(jiān)控器： 無
帶序列發(fā)生器： 無
電源電壓： 1.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-WQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 16-TQFN-EP（4x4）
包裝： 帶卷 (TR)
1
3MHz Dual Step-Down Converters and Dual Low-Input
LDOs with I
2
C Compatible Interface
ISL9305
The ISL9305 is an integrated mini Power Management IC
(mini-PMIC) ideal for applications of powering low-voltage
microprocessor or multiple voltage rails with battery as input
sources, such as a single Li-ion or Li-Polymer. ISL9305
integrates two high-efficiency 3MHz synchronous step-down
converters (DCD1 and DCD2) and two low-input, low-dropout
linear regulators (LDO1 and LDO2).
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 the efficiency and maximize the battery life.
For noise sensitive applications, they can also be programmed
through I
2
C interface to operate in forced PWM mode
regardless of the load current condition. The I
2
C interface
supports on-the-fly slew rate control of the output voltage from
0.825V to 3.6V at 25mV/step size for dynamic power saving.
Each step-down converter can supply up to 800mA load
current. The default output voltage can be set from 0.8V to V
IN
 
using external feedback resistors on the adjustable version, or
the ISL9305 can be ordered in factory pre-set power-up default
voltages in increments of 100mV from 0.9V to 3.6V.
The ISL9305 also provides two 300mA low dropout (LDO)
regulators. The input voltage range is 1.5V to 5.5V allowing
them to be powered from one of the on-chip step-down
converters or directly from the battery. The default LDO
power-up output comes with factory pre-set fixed output
voltage options between 0.9V to 3.3V.
The ISL9305 is available in a 4mmx4mm 16 Ld TQFN
package.
Related Literature
" FN7724
, ISL9305H Data Sheet
" AN1564
 ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z
Evaluation Boards
Features
" Dual 800mA, Synchronous Step-down Converters and Dual
300mA, General-purpose LDOs
" Input Voltage Range
-  DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to 5.5V
-  LDO1/LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V
" 400kb/s I
2
C-bus Series Interface Transfers the Control Data
Between the Host Controller and the ISL9305
" Adjustable Output Voltage
-  DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to V
IN
-  Fixed Output I
2
C Programmability
" At 25mV/step. . . . . . . . . . . . . . . . . . . . . . . . . . .0.825V to 3.6V
" LDO1/LDO2 Output Voltage I
2
C Programmability
-  At 50mV/step. . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.3V
" 50糀 I
Q
(Typ) with DCD1/DCD2 in Skip Mode; 20糀 I
Q
(Typ)
for each Enabled LDO
" On-the-fly I
2
C Programming of DC/DC and LDO Output
Voltages
" DCD1/DCD2 I
2
C Programmable Skip Mode Under Light
Load or Forced Fixed Switching Frequency PWM Mode
" Small, Thin, 4mmx4mm TQFN Package
Applications
" Cellular Phones, Smart Phones
" PDAs, Portable Media Players, Portable Instruments
" Single Li-ion/Li-Polymer Battery-Powered Equipment
" DSP Core Power
FIGURE 1. TYPICAL APPLICATION DIAGRAM
*
*
ISL9305
SDAT
VINDCD1
VINLDO1
VINLDO2
L
1
 = 1.5礖
SW1
FB1
SW2
FB2
VOLDO2
2.3V TO 5.5V
800mA
L
2
= 1.5礖
800mA
1.5V TO 5.5V
1.5V TO 5.5V
GNDDCD1
300mA
300mA
C
3
R
1
R
2
R
3
R
4
GNDDCD2
SCLK
VOLDO1
GNDLDO
PG
VINDCD2
*Only for adjustable output version. For fixed output version, directly
connect the FB pin to the output of the buck converter.
1礔
C
2
1礔
C
10
10礔
C
7
1礔
C
6
1礔
C
5
4.7礔
C
4
4.7礔
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. 2010, 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 property of their respective owners.
August 15, 2011
FN7605.1
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ISL9307IRTAAJBZ-T 功能描述:直流/直流開關(guān)調(diào)節(jié)器 DL DC/DC & DLLDO ADJ /1 8/1 2/3 TQFN L16 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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ISL9307IRTAAJFZ-T 功能描述:直流/直流開關(guān)調(diào)節(jié)器 DL DC/DC & DLLDO ADJ /1 8/1 2/3 TQFN L16 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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