L5972D STMicroelectronics, L5972D Datasheet - Page 7

• Manufacturer Part Number: L5972D
• Description: IC REG SW 2A STEP-DOWN 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5972D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2A
• Frequency - Switching: 250kHz
• Voltage - Input: 4.4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 1.2W
• Output Voltage: 35 V
• Output Current: 2 A
• Input Voltage: 4.4 V to 36 V
• Switching Frequency: 212 KHz to 280 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100% duty cycle
• For Use With: 497-4741 - BOARD EVAL FOR L5972D SW REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L5972D
5
Application circuit
In figure 8 is shown the demo board application circuit for the device in SMD version, where
the input supply voltage, Vcc, can range from 4.4V to 25V due to the rated voltage of the
input capacitor and the output voltage is adjustable from 1.235V to V
Figure 9.
Table 5.
C1
C2
C3
C4
R1
R2
R3
D1
L1
CERAMIC
VIN = 4.4V to 25V
10µF
Reference
25V
C1
Demo board application circuit
Component list
GRM32DR61E106KA12L
POSCAP 10TPB100M
C1206C221J5GAC
C1206C223K5RAC
STPS2L25U
DO3316P-333
220pF
22nF
C4
C3
COMP
Part number
VCC
4.7K
R3
8
4
6
L5972D
2
3
10µF, 25V
100µF, 10V
220pF, 5%, 50V
22nF, 10%, 50V
5.6K, 1%, 0.1W 0603
3.3K, 1%, 0.1W 0603
4.7K, 1%, 0.1W 0603
2A, 25V
33µH, 2.1A
7
D03IN1438
GND
1
5
Description
OUT
FB
STPS2L25U
L1 33µH
D1
cc
MURATA
Sanyo
KEMET
KEMET
Neohm
Neohm
Neohm
ST
COILCRAFT
.
Application circuit
Manufacturer
5.6K
3.3K
R1
R2
VOUT=3.3V
100µF
10V
C2
7/15