http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




STMicroelectronics Electronic Components Datasheet

L5973D Datasheet

2.5A SWITCH STEP DOWN SWITCHING REGULATOR

No Preview Available !

L5973D pdf
L5973D
2.5A SWITCH STEP DOWN SWITCHING REGULATOR
s 2.5A INTERNAL SWITCH
s OPERATING INPUT VOLTAGE FROM 4.4V TO 36V
s 3.3V / (±2%) REFERENCE VOLTAGE
s OUTPUT VOLTAGE ADJUSTABLE FROM
1.235V TO 35V
s LOW DROPOUT OPERATION: 100% DUTY
CYCLE
s 250KHz INTERNALLY FIXED FREQUENCY
s VOLTAGE FEEDFORWARD
s ZERO LOAD CURRENT OPERATION
s INTERNAL CURRENT LIMITING
s INHIBIT FOR ZERO CURRENT
CONSUMPTION
s SYNCHRONIZATION
s PROTECTION AGAINST FEEDBACK
DISCONNECTION
s THERMAL SHUTDOWN
APPLICATIONS:
s CONSUMER: STB, DVD, TV, VCR,CAR
RADIO, LCD MONITORS
s NETWORKING: XDSL, MODEMS,DC-DC
MODULES
s COMPUTER: PRINTERS, AUDIO/GRAPHIC
CARDS, OPTICAL STORAGE, HARD DISK
DRIVE
s INDUSTRIAL: CHARGERS, CAR BATTERY
DC-DC CONVERTERS
HSOP8 - EXPOSED PAD
ORDERING NUMBER: L5973D
DESCRIPTION
The L5973D is a step down monolithic power switch-
ing regulator with a minimum switch current limit of
2.5A so it is able to deliver more than 2A DC current
to the load depending on the application conditions.
The output voltage can be set from 1.235V to 35V.
The high current level is also achieved thanks to an
SO8 package with exposed frame, that allows to re-
duce the Rth(j-amb) down to approximately 40°C/W
The device uses an internal P-Channel D-MOS tran-
sistor (with a typical Rdson of 250m) as switching
element to minimize the size of the external compo-
nents.
An internal oscillator fixes the switching frequency at
250KHz.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all com-
puter related applications.
Pulse by pulse current limit with the internal frequen-
cy modulation offers an effective constant current
short circuit protection.
TEST APPLICATION CIRCUIT
VREF
3.3V
VIN = 4.4V to 35V
VCC
SYNC.
6
8
2
L5973D
1
C1
10µF
35V
CERAMIC
COMP
C4
22nF
43
INH
C3
220pF
R3
4.7K
5
7
GND
OUT
FB
L1 15µH
D1
STPS340U
VOUT=3.3V
R1
5.6K
R2
3.3K
C2
330µF
10V
May 2003
D03IN1439
1/10


STMicroelectronics Electronic Components Datasheet

L5973D Datasheet

2.5A SWITCH STEP DOWN SWITCHING REGULATOR

No Preview Available !

L5973D pdf
L5973D
PIN CONNECTION
OUT
SYNC
INH
COMP
18
27
36
45
D98IN955
VCC
GND
VREF
FB
PIN DESCRIPTION
N° Pin
Function
1 OUT Regulator Output.
2 SYNC Master/slave synchronization.
3 INH A logical signal (active high) disables the device. If INH not used the pin must be grounded.
When it is open an internal pull-up disable the device.
4 COMP E/A output for frequency compensation.
5 FB Feedback input. Connecting directly to this pin results in an output voltage of 1.23V. An external
resistive divider is required for higher output voltages.
6 VREF 3.3V VREF. No cap is requested for stability.
7 GND Ground.
8 VCC Unregulated DC input voltage.
THERMAL DATA
Symbol
Parameter
Rth (j-amb) Thermal Resistance Junction to ambient
(*) Package mounted on board
Max.
Value
40 (*)
Unit
°C/W
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
V8 Input Voltage
V1 Output DC voltage
Output peak voltage at t = 0.1µs
I1 Maximum output current
V4, V5 Analog pins
V3 INH
V2 SYNC
Ptot Power dissipation at Tamb 60°C
Tj Operating junction temperature range
Tstg Storage temperature range
Value
40
-1 to 40
-5 to 40
int. limit.
4
-0.3V to VCC
-0.3 to 4
2.25
-40 to 150
-55 to 150
Unit
V
V
V
V
V
W
°C
°C
2/10


Part Number L5973D
Description 2.5A SWITCH STEP DOWN SWITCHING REGULATOR
Maker STMicroelectronics
Total Page 10 Pages
PDF Download
L5973D pdf
Download PDF File
L5973D pdf
View for Mobile






Related Datasheet

1 L5973 2.5A SWITCH STEP DOWN SWITCHING REGULATOR STMicroelectronics
STMicroelectronics
L5973 pdf
2 L5973AD 2A SWITCH STEP DOWN SWITCHING REGULATOR STMicroelectronics
STMicroelectronics
L5973AD pdf
3 L5973ADTR 2A SWITCH STEP DOWN SWITCHING REGULATOR STMicroelectronics
STMicroelectronics
L5973ADTR pdf
4 L5973D 2.5A SWITCH STEP DOWN SWITCHING REGULATOR STMicroelectronics
STMicroelectronics
L5973D 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