RT8251GSP Richtek USA Inc, RT8251GSP Datasheet - Page 7

• 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

(200mV/Div)
DS8251-01 March 2011
V
(2A/Div)
OUT
I
OUT
610
600
590
580
570
560
550
9.3
8.7
8.1
7.5
6.9
6.3
5.7
4
0
Switching Frequency vs. Input Voltage
V
I
OUT
IN
= 12V, V
10
= 0A to 5A
6.5
Current Limit vs. Duty Cycle
Load Transient Response
20
OUT
9
30
Time (100μs/Div)
Input Voltage (V)
= 3.3V
11.5
Duty Cycle (%)
40
14
50
V
OUT
60
16.5
= 3.3V, I
70
19
80
OUT
21.5
90
= 1A
100
24
(200mV/Div)
(10mV/Div)
(10V/Div)
V
V
(2A/Div)
(2A/Div)
OUT
V
OUT
I
I
SW
SW
OUT
630
610
590
570
550
530
510
-50
Switching Frequency vs. Temperature
V
I
OUT
IN
= 12V, V
= 2.5A to 5A
-25
Load Transient Response
OUT
0
Temperature ( ° C)
Output Ripple
Time (100μs/Div)
= 3.3V
Time (1μs/Div)
25
V
50
OUT
RT8251
www.richtek.com
= 3.3V, I
75
V
V
I
OUT
IN
OUT
V
V
OUT
= 12V
100
IN
IN
= 5A
= 3.3V
= 12V
= 24V
= 1A
125
7