RT8251GSP Richtek USA Inc, RT8251GSP Datasheet - Page 14

• Manufacturer Part Number: RT8251GSP
• Description: IC DCDC CTRLR STP-DN 8SOP
• Manufacturer: Richtek USA Inc
• Type: Step-Down (Buck)r

Specifications of RT8251GSP

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 V ~ 15 V
• Current - Output: 5A
• Frequency - Switching: 570kHz
• Voltage - Input: 4.75 V ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RT8251
Table 3. Suggested Capacitors for C
Table 4. Suggested Diode
www.richtek.com
14
Location
Component Supplier
C
C
C
C
C
C
C
OUT
OUT
OUT
OUT
IN
IN
IN
DIODES
ON
Component Supplier
Input capacitor must
be placed as close
to the IC as possible.
TAIYO YUDEN
TAIYO YUDEN
MURATA
MURATA
MURATA
TDK
TDK
MBRS540T3
GND
V
C
OUT
Part No.
OUT
B540C
Figure 10. PCB Layout Guide for PSOP-8 Package
C
C
IN
S
IN
V
L
SW should be connected to inductor by
wide and short trace. Keep sensitive
components away from this trace.
GRM32ER61C476M
GRM31ER61E226K
GRM31CR60J476M
IN
and C
C4535X5R1E226M
C3216X5R0J476M
TMK325BJ226MM
D
LMK316BJ476MM
R
S
SW
V
BOOT
Part No.
C
OUT
GND
RRM
BOOT
VIN
SW
40
40
GND
(V)
2
3
4
GND
I
OUT
9
5
5
8
7
6
5
(A)
Capacitance ( F)
The feedback components
must be connected as close
to the device as possible.
C
SS
EN
COMP
FB
SS
Package
22
22
22
47
47
47
47
R2
SMC
SMC
R1
V
OUT
C
C
C
P
GND
R
C
Case Size
1210
1812
1210
1210
1206
1206
1206
DS8251-01 March 2011