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PDF INN9182 Data sheet ( Hoja de datos )
| Número de pieza | INN9182 | |
| Descripción | 2.3-A Synchronous Step-Down Converter | |
| Fabricantes | INNOTECH | |
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INNOTECH
[email protected] 13510327305
INN9182
4.3V to 23V Input, 2.3-ASynchronous Step-Down Converter with Fast Transient Response
For details, check for samples: INN9182
Features
Applications
y W-mode™® Gm Curvature Enables Fast
Transient Response
y 2.3-A Output Current
y High Efficient Integrated FETs Optimized for
portable application:
95mΩ (High side) and 90mΩ (Low side)
y High Efficiency
Up to 96% Efficiency @ 5V Input, 3.3V Output
Up to 94% efficiency @ 12V Input, 3.3V Output
y Wide Input Voltage Range: 4.3V to 23V @ 2.3-A
loading
y Wide Output Voltage Range: 0.923V to 18V @
2.3-A loading ( 36Watt output @max)
y Low Output Ripple and Allows Ceramic Output
Capacitor
y Thermal Shutdown Protection
y 340-KHz Switching Frequency(fsw)
y Cycle By Cycle Over Current Limit
y +/-1.5% High Accuracy Feedback Voltage
y Wide Range of Applications for Low Voltage
System
- Digital TV Power Supply
- High Definition Blu-ray Disc Players
- Networking Home Terminal
- Digital STB
- Ideal for Portable Applications
Descriptions
The INN9182 is a current mode synchronous
buck converter, and has a proprietary W-mode™®
Gm curvature circuit that enables fast transient
response, enables the device to adopt to both low
ESR output capacitors, such as POSCAP or
SP-CAP, and ultra-low ESR ceramic capacitors.
The INN9182 operates from 4.3-V to 23-V Vin
input, and the output voltage can be programmed
between 0.923v to 18v with 2.3A output current,
and +/-1.5% high accuracy output voltage.
Due to 95mΩ (High side) and 90mΩ (Low side)
integrated FETs, the INN9182 works in high
efficiency (up to 94% @12v Input, 3.3v output) .
Typical Application
Input
C3 10nF
C1
10 µF/25V
C eramic
R4 100K 2 1
IN
7
EN
BS 3
SW
8 FB 5
SS COMP G
L1 10µH
R1 26.1K
1%
C8
0.1µF
64
C4
3.3nF
R2 10K
1%
R3
2.2K
Output
3.3V 2.3A
Cout
22µF/6.3V
Ceramic
X2
Confidential INNOTECH Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
@2010, All Rights Reserved
1
1 page  
INNOTECH
INN9182
PIN ARRANGEMENT
BS 1
8 SS
IN 2
7 EN
SW 3
6 COMP
G4
5 FB
PIN FUNCTIONS
PIN Description
NAME
NO.
Deatails
BS 1
Supply input for high-side NFET gate driver (boost terminal). Connect capacitor from
this pin to SW pin. An internal PN diode is connected between VREG to BS pin.
IN 2 Power input and connected to high side NFET drain
SW 3
Switch node connection between high-side NFET and low-side NFET. Also serve as
inputs to current comparators.
G 4 Signal ground pin, also serve as ground returns for low-side NFET.
FB 5 Converter feedback input. Connect with feedback resistor divider.
COMP
6
Compensation Node. Used to compensate control loop. Connect a series RC
network from COMP to G. In some cases, an additional capacitor is required
EN 7
Enable control input
SS 8
Soft-start control. A external capacitor should be connected to G.
Confidential INNOTECH Proprietary Information. Unauthorized Photocopy and Duplication Prohibited
@2010, All Rights Reserved
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet INN9182.PDF ] | |
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