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PDF RT2528 Data sheet ( Hoja de datos )
| Número de pieza | RT2528 | |
| Descripción | 2.5A Power Switch | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT2528
120mΩ, 2.5A Power Switch with Adjustable Current Limit
General Description
The RT2528 is a cost effective, low voltage, P-MOSFET
power switch IC with an adjustable current limit feature.
Low on-resistance (74mΩ typ.) and low supply current
(120μA typ.) are designed in this IC.
The RT2528 can offer an adjustable current limit threshold
between 0.5A and 2.5A (typ.) via an external resistor. The
±10% current limit accuracy can be realized for all current
limit settings.
The RT2528 is an ideal solution for power supply
applications since it is functional for various current limit
requirements. The RT2528 is available in the thermal
enhanced SOP-8 (Exposed Pad) package.
Ordering Information
RT2528
Package Type
SP : SOP-8 (Exposed Pad-option 2)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
RT2528
GSPYMDNN
RT2528GSP : Product Number
YMDNN : Date Code
Features
z Adjustable Current Limit : 0.5A to 2.5A (typ.)
z ±10% Current Limit Accuracy @ 2A Over
Temperature
z 120mΩ P-MOSFET
z Low Supply Current : 120μA
z Input Operating Voltage Range : 2.5V to 5.5V
z Reverse Input-Output Voltage Protection
z Built-in Soft-Start
z RoHS Compliant and Halogen Free
z AEC-Q100 Grade 3 Certification
Applications
z Automotive Audio, Navigation & Info Systems
z Industrial Grade General Purpose Point of Load
z Digital Set Top Boxes
z Vehicle Electronics
Pin Configurations
(TOP VIEW)
VOUT
VOUT
ILIM
FAULT
8
27
GND
36
9
45
VIN
VIN
GND
EN
SOP-8 (Exposed Pad)
Simplified Application Circuit
VIN VIN VOUT
CIN RT2528
ILIM
Enable
EN GND
RILIM
VOUT
COUT
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS2528-02 Oct 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
Typical Application Circuit
VIN
RFAULT
100k
FAULT Signal
Enable
7, 8 VIN
CIN
VOUT 1, 2
10µF
RT2528
RILIM
COUT
22µF
4 FAULT
ILIM 3 13k
5 EN
GND 6, 9 (Exposed Pad)
VOUT
Note : RILIM = 13kΩ for 2A Power Switch Operation
RT2528
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS2528-02 Oct 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
The maximum power dissipation depends on the operating
ambient temperature for fixed TJ(MAX) and thermal
resistance, θJA. The derating curve in Figure 2 allows the
designer to see the effect of rising ambient temperature
on the maximum power dissipation.
3.0 Four-Layer PCB
2.5
2.0
1.5
1.0
0.5
0.0
0
25 50 75 100
Ambient Temperature (°C)
125
Figure 2. Derating Curve of Maximum Power Dissipation
RT2528
Layout Consideration
` Ounce copper on top layer will improve thermal
performance. 4-layer PCB will be better.
` Place the shape with minimum 70mm2 as Figure 3
around the SOP-8 (Exposed Pad) footprint to achieve
best thermal performance.
Copper Area = 70mm2, θJA = 49°C/W
Figure 3. PCB Copper Area
` Utilize standard PTH (Plated Through Hole, 25mil
diameter, as Figure 4) to Via down from exposed pad
on top layer to GND plane on other layers.
Figure 4. Standard PTH to GND Plane
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS2528-02 Oct 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT2528.PDF ] | |
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