ACT4088 Datasheet PDF - Active-Semi
| Part Number | ACT4088 | |
| Description | 1.4MHz Step-Down DC/DC Converter | |
| Manufacturers | Active-Semi | |
| Logo |  |
|
|
There is a preview and ACT4088 download ( pdf file ) link at the bottom of this page. Total 11 Pages | ||
Preview 1 page No Preview Available !
ACT4088
Rev PrA, 24-Jul-07
Advanced Product Information – All Information Subject to Change
28V, 1.5A, 1.4MHz Step-Down DC/DC Converter in SOT23-6
FEATURES
Wide 4.5V to 28V Input Voltage Range
1.5A Output Current (12VIN to 5VOUT)
Output Adjustable Down to 0.81V
0.3Ω Internal Power MOSFET
Up to 92% Efficiency
Stable with Low ESR Ceramic Output Capacitors
Fixed 1.4MHz Operating Frequency
Internal Soft-Start Function
Over Current Protection with Hiccup-Mode
Thermal Shutdown
Available in a SOT23-6 Package
APPLICATIONS
TFT LCD Monitors
Portable DVDs, Headphones, MP3 Players, etc.
Car-Powered or Battery-Powered Equipment
Set-Top Boxes
Telecom Power Supplies
DSL and Cable Modems and Routers
GENERAL DESCRIPTION
The ACT4088 is a current-mode step-down DC/DC
converter that supplies up to 1.5A into 5V from a
12V input. 1.4MHz switching frequency allows the
use of tiny external components, and internal loop
compensation provides simple, stable power sup-
plies with a minimum of external components. Opti-
mized for use with ceramic input and output capaci-
tors, the ACT4088 provides a very compact 1.5A
power supply for space constrained mobile and
consumer applications.
The ACT4088 operates over a wide input voltage
range and utilizes current-mode operation to pro-
vide excellent line and load transient response
while requiring no external compensation compo-
nents. Fault protection includes cycle-by-cycle cur-
rent limiting, frequency fold-back, hiccup mode, and
thermal shutdown. Internal soft-start provides a
controlled startup with no overshoot, even at light
loads.
The ACT4088 is available in a tiny SOT23-6 pack-
age and requires very few external components.
TYPICAL APPLICATION CIRCUIT
www.DataSheet4U.com
Innovative Products. Active Solutions.
-1-
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
|
| |
 
ACT4088
Rev PrA, 24-Jul-07
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Circuit of Figure 2, VIN = 12V, L = 4.7µH, C1 = 10µF, C2 = 22µF, TA = +25°C, unless otherwise specified.)
Load Transient Response
ILOAD = 200mA to 800mA
CH1
www.DataSheet4U.com
Load Transient Response
ILOAD = 200mA to 1.5A
CH1
CH2
CH1: VOUT, 50mV/div
CH2: ILOAD, 500mA/div
TIME: 100µs/div
CH2
CH1: VOUT, 50mV/div
CH2: ILOAD, 500mA/div
TIME: 100µs/div
Start-up Waveforms
ILOAD = 0mA
CH1
CH2
CH3
CH1: VOUT, 2V/div
CH2: VSW, 10V/div
CH3: IL, 1A/div
TIME: 200µs/div
Steady State Switching Waveforms
CH1
ILOAD = 1A
CH2
CH3
CH1: VOUT, 50mV/div, (AC COUPLED)
CH2: VSW, 10V/div
CH3: IL, 500mA/div
TIME: 400ns/div
Start-up Waveforms
ILOAD = 1A
CH1
CH2
CH3
CH4
CH1: VEN, 2V/div
CH2: VOUT, 2V/div
CH3: VSW, 10V/div
CH4: IL, 1A/div
TIME: 400µs/div
Hiccup Mode Switching Waveforms
CH1
CH2
CH1: VOUT, 100mV/div, (AC COUPLED)
CH2: IL, 1A/div
TIME: 1ms/div
Innovative Products. Active Solutions.
-5-
www.active-semi.com
Copyright © 2007 Active-Semi, Inc.
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ACT4088 electronic component. |
| Information | Total 11 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ACT4088.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| ACT4082A | The function is 1.4MHz Step-Down DC/DC Converter. Active-Semi | |
| ACT4088 | The function is 1.4MHz Step-Down DC/DC Converter. Active-Semi | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
ACT4
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||