参数资料
| 型号： | ISL9112IRT7Z-T7A |
| 厂商： | Intersil |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST SYNC 5V 12TDFN |
| 标准包装： | 1 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 1.8 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 2.5MHz |
| 电流 - 输出： | 1.2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 12-TDFN-EP（3x3） |
| 其它名称： | ISL9112IRT7Z-T7ADKR |
ISL9110, ISL9112
Applications Information
Component Selection
The ISL9112 and the fixed-output versions of the ISL9110
Non-Adjustable Version FB Pin Connection
The fixed output versions of the ISL9110 and the I 2 C-adjustable
ISL9112 do not require external resistors or a capacitor on the FB
pin. Simply connect VOUT to FB, as shown in Figure 33.
5 PVIN
LX1
6
LX2
VOUT 1
MODE
EN
FB 12
SDA
SCL
require only three external power components to implement the
buck boost converter: an inductor, an input capacitor, and an
output capacitor.
The adjustable ISL9110 versions require three additional
components to program the output voltage. Two external
resistors program the output voltage, and a small capacitor is
added to improve stability and response.
V IN =
1.8V TO 5.5V
C1
10μF
C3
0.1μF
I 2 C
BUS
10
9
8
7
VIN
ISL9112
4
2
L1
2.2μH
V OUT =
3.3V/1A
C2
10μF
An optional input supply filtering capacitor (“C3” in Figure 32)
can be used to reduce the supply noise on the VIN pin, which
provides power to the internal reference. In most applications,
this capacitor is not needed.
LX1
FB
V IN =
1.8V TO 5.5V
C1
10μF
C3
0.1μF
STATUS
OUTPUTS
5
6
10
9
8
7
ISL9110
PVIN
VIN LX2
MODE VOUT
EN
BAT
PG
4
2
1
12
L1
2.2μH
R1
1M
R2
324k
C4
56pF
V OUT =
3.3V/1A
C2
10μF
FIGURE 33. TYPICAL ISL9110IRTNZ APPLICATION
Inductor Selection
An inductor with high frequency core material (e.g. ferrite core)
should be used to minimize core losses and provide good
efficiency. The inductor must be able to handle the peak
switching currents without saturating.
A 2.2 μ H inductor with ≥ 2.4A saturation current rating is
recommended. Select an inductor with low DCR to provide good
efficiency. In applications where radiated noise must be
FIGURE 32. TYPICAL ISL9110IRTAZ APPLICATION
minimized, a toroidal or shielded inductor can be used.
TABLE 5. INDUCTOR VENDOR INFORMATION
Output Voltage Programming, Adj. Version
Setting and controlling the output voltage of the ISL9110IRTAZ
(adjustable output version) can be accomplished by selecting the
external resistor values.
Equation 2 can be used to derive the R1 and R2 resistor values:
MANUFACTURER
Coilcraft
Murata
Taiyo Yuden
SERIES
LPS4018
LQH44P
NRS4018
NRS5012
WEBSITE
V OUT = 0.8V ? ? 1 + ------- ?
? R2 ?
R1
(EQ. 2)
Sumida
CDRH3D23/HP
CDRH4D22/HP
When designing a PCB, include a GND guard band around the
feedback resistor network to reduce noise and improve accuracy
Toko
DEM3518C
and stability. Resistors R1 and R2 should be positioned close to
the FB pin.
Feed-Forward Capacitor Selection
A small capacitor in parallel with resistor R1 is required to
provide the specified load and line regulation. The suggested
value of this capacitor is 56pF for R1 = 1M Ω . An NPO type
PVIN and VOUT Capacitor Selection
The input and output capacitors should be ceramic X5R type with
low ESL and ESR. The recommended input capacitor value is
10 μ F. The recommended VOUT capacitor value is 10 μ F to 22 μ F.
TABLE 6. CAPACITOR VENDOR INFORMATION
capacitor is recommended.
17
MANUFACTURER
AVX
Murata
Taiyo Yuden
TDK
X5R
X5R
X5R
X5R
SERIES
WEBSITE
FN7649.2
July 13, 2012
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL9112IRTNEVAL1Z | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:1.2A High Efficiency Buck-Boost Regulators |
| ISL9112IRTNZ | 制造商:Intersil Corporation 功能描述: 制造商:Intersil Corporation 功能描述:1.2A SINGLE INDUCTOR BUCK-BOOST, 3.3V, 12LD 3X3 EP TDFN - Trays |
| ISL9112IRTNZ-EVAL1Z | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:1.2A High Efficiency Buck-Boost Regulators Output Current: Up to 1.2A |
| ISL9112IRTNZ-T | 制造商:Intersil Corporation 功能描述:1.2A SINGLE INDUCTOR BUCK-BOOST, 3.3V, 12LD 3X3 EP TDFN - Tape and Reel |
| ISL9112IRTNZ-T7A | 功能描述:IC REG BUCK BST SYNC 3.3V 12TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:1 系列:EZBuck™ 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.8 V ~ 22.1 V 输入电压:3 V ~ 26 V PWM 型:电流模式 频率 - 开关:1.5MHz 电流 - 输出:1.8A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 包装:剪切带 (CT) 供应商设备封装:8-DFN（2x2） 其它名称:785-1276-1 |
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