RT8251GSP Richtek USA Inc, RT8251GSP Datasheet - Page 4

• 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
Function Block Diagram
Absolute Maximum Ratings
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Recommended Operating Conditions
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www.richtek.com
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SOP-8 (Exposed Pad) ------------------------------------------------------------------------------------ 1.333W
SOP-8 (Exposed pad),
WQFN-16L 3x3,
SOP-8 (Exposed Pad),
Supply Voltage, V
Switching Voltage, V
BOOT Voltage, V
All Other Pins ----------------------------------------------------------------------------------------------- 0.3V to 6V
Power Dissipation, P
WQFN-16L 3x3 --------------------------------------------------------------------------------------------- 1.471W
Package Thermal Resistance (Note 2)
WQFN-16L 3x3,
Junction Temperature ------------------------------------------------------------------------------------- 150 C
Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------- 260 C
Storage Temperature Range ----------------------------------------------------------------------------- 65 C to 150 C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------- 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------- 200V
Supply Voltage, V
Enable Voltage, V
Junction Temperature Range ----------------------------------------------------------------------------
Ambient Temperature Range ----------------------------------------------------------------------------
VIN
EN
SS
1µA
10k
BOOT
3V
JA
EN
IN
IN
JC
V
CC
--------------------------------------------------------------------------------------- 0.3V to 26V
--------------------------------------------------------------------------------------- 68 C/W
--------------------------------------------------------------------------------------- 7.5 C/W
--------------------------------------------------------------------------------------- 4.75V to 24V
--------------------------------------------------------------------------------------- 0V to 5.5V
SW
D
1.1V
------------------------------------------------------------------------------------- (V
@ T
V
----------------------------------------------------------------------------------- 0.3V to (V
CC
JA
JC
Comparator
Shutdown
A
------------------------------------------------------------------------------- 75 C/W
10µA
VA V
------------------------------------------------------------------------------ 15 C/W
Regulator
= 25 C
+
-
Internal
CC
FB
Gm = 820µA/V
0.4V
0.8V
Comparator
(Note 1)
UV
+
-
Foldback
Control
+
+
-
Oscillator
570kHz
EA
COMP
(Note 4)
Comparator
Current
+
-
Slope Comp
Logic
Current Sense
Amplifier
+
-
40 C to 125 C
40 C to 85 C
SW
DS8251-01 March 2011
VA
0.3V) to (V
IN
BOOT
SW
GND
0.3V)
SW
6V)