datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Richtek Technology Electronic Components Datasheet  

RT7250A Datasheet

(RT7250A/B) Synchronous Step-Down Converter

No Preview Available !

RT7250A pdf
® RT7250A/B
2A, 17V, 340/800kHz Synchronous Step-Down Converter
General Description
The RT7250A/B is a high efficiency, monolithic
synchronous step-down DC/DC converter that can operate
at 340kHz/800kHz, while delivering up to 2A output current
from a 4V to 17V input supply. The RT7250A/B's current
mode architecture allows the transient response to be
optimized. Cycle-by-cycle current limit provides protection
against shorted outputs and soft-start eliminates input
current surge during start-up. Fault conditions also include
output under voltage protection, output over voltage
protection and thermal shutdown. The low current (<5μA)
shutdown mode provides output disconnection, enabling
easy power management in battery-powered systems. The
RT7250A/B is available in a SOP-8 (Exposed Pad)
package.
Ordering Information
RT7250A/B
Package Type
SP: SOP-8 (Exposed Pad-Option 1)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
A : 340kHz
B : 800kHz
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
SW
VIN
BOOT
EN
8
27
GND
36
9
45
NC
GND
PGOOD
FB
SOP-8 (Exposed Pad)
Features
z 4V to 17V Input Voltage Range
z 2A Output Current
z Internal N-MOSFETs
z Current Mode Control
z Fixed Frequency Operation : 340kHz/800kHz
z Output Adjustable from 0.8V to 12V
z Up to 95% Efficiency
z Internal Compensation
z Stable with Low ESR Ceramic Output Capacitors
z Cycle-by-Cycle Over Current Protection
z Input Under Voltage Lockout
z Output Under Voltage Protection
z Output Over Voltage Protection
z Power Good Indicator
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Applications
z Industrial and Commercial Low Power Systems
z Computer Peripherals
z LCD Monitors and TVs
z Green Electronics/Appliances
z Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Marking Information
RT7250AZSP
RT7250A
ZSPYMDNN
RT7250AZSP : Product Number
YMDNN : Date Code
RT7250BZSP
RT7250B
ZSPYMDNN
RT7250BZSP : Product Number
YMDNN : Date Code
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7250A/B-01 May 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
Free Datasheet http://www.datasheet4u.com/


  Richtek Technology Electronic Components Datasheet  

RT7250A Datasheet

(RT7250A/B) Synchronous Step-Down Converter

No Preview Available !

RT7250A pdf
RT7250A/B
Typical Application Circuit
VIN
4V to 17V
CIN
10µF
PGOOD
Chip Enable
RT7250A
2 VIN
BOOT 3
6 PGOOD
4 EN
SW 1
FB 5
7, 9 (Exposed Pad) GND
CBOOT
10nF
L
15µH
R1
110k
R2
36k
VOUT
3.3V
COUT
22µF x 2
VIN
4V to 17V
CIN
10µF
PGOOD
Chip Enable
RT7250B
2 VIN
BOOT 3
6 PGOOD
4 EN
SW 1
FB 5
7, 9 (Exposed Pad) GND
CBOOT
10nF
L
6.8µH
R1
47k
R2
15k
VOUT
3.3V
COUT
22µF x 2
Table 1. Recommended Component Selection
RT7250A
VOUT (V)
1.2
L (μH)
4.7
R1 (kΩ) R2 (kΩ) COUT (μF)
110 220 22 x 2
2.5 10 110 51 22 x 2
3.3 15 110 36 22 x 2
5 22 120 22 22 x 2
RT7250B
VOUT (V)
1.2
2.5
3.3
5
L (μH)
3.6
4.7
6.8
10
R1 (kΩ)
47
47
47
62
R2 (kΩ)
91
22
15
12
COUT (μF)
22 x 2
22 x 2
22 x 2
22 x 2
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS7250A/B-01 May 2012
Free Datasheet http://www.datasheet4u.com/


Part Number RT7250A
Description (RT7250A/B) Synchronous Step-Down Converter
Maker Richtek
Total Page 14 Pages
PDF Download
RT7250A pdf
RT7250A Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 RT7250A (RT7250A/B) Synchronous Step-Down Converter Richtek
Richtek
RT7250A pdf
2 RT7250B (RT7250A/B) Synchronous Step-Down Converter Richtek
Richtek
RT7250B pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy