RT9703PS RICHTEK [Richtek Technology Corporation], RT9703PS Datasheet

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RT9703PS

Manufacturer Part Number
RT9703PS
Description
80m?, 3A Smart Universal Power Switch with Flag
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
RT9703PS
Manufacturer:
RICHTEK/立锜
Quantity:
20 000
80m Ω Ω Ω Ω Ω , 3A Smart Universal Power Switch with Flag
General Description
The RT9703 is a low voltage, high performance single
N-MOSFET power switch, designed for power rail on/off
control with low R
functions. The RT9703 equipped with a charge pump
circuitry to drive the internal MOSFET switch and a flag
output is available to indicate fault conditions against large
di/dt which may cause the supply to fall out of regulation.
In order to fit different application, an IP pin is offered for
current limit point setting, a resistor from IP to ground
sets the current limit for the switch.
Additional features include soft-start to limit inrush current
during plug-in, thermal shutdown to prevent catastrophic
switch failure from high-current loads, under-voltage
lockout (UVLO) to ensure that the device remains off
unless there is a valid input voltage present, a precision
resistor-programmable output current limit up to 3.5A.
Besides, the lower quiescent current as 30μA making this
device ideal for portable battery-operated equipment.
The RT9703 is available in SOP-8 package requiring
minimum board space and smallest components.
Ordering Information
Note :
RichTek Pb-free and Green products are :
DS9703-08 March 2007
RT9703
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
DS(ON)
≈ 80mΩ and full protection
Features
Applications
Pin Configurations
Adjustable Current Limiting up to 3.5A
Built-In (Typically 80mΩ Ω Ω Ω Ω ) N-MOSFET
Reverse Current Flow Blocking (no body diode) i.e.
Output Can Be Forced Higher than Input (Off-State)
Low Supply Current :
Guaranteed 3A Continuous Load Current
Wide Input Voltage Ranges : 2V to 5.5V
Open-Drain Fault Flag Output
Hot Plug-In Application (Soft-Start)
1.7V Typical Under-Voltage Lockout (UVLO)
Thermal Shutdown Protection
Smallest SOP-8 Package Minimizes Board Space
RoHS Compliant and 100% Lead (Pb)-Free
LCD Monitor, LCD-TV
USB Power Module for ADSL
Information Appliance and Set-Top Box
Battery-Powered Equipment
Hot-Plug Power Supplies
ACPI Power Distribution
PCI Bus Power Switching
Motherboard & Notebook PCs
PC Card Hot Swap Application
30μ μ μ μ μ A Typical at Switch on State
Less than 1μ μ μ μ μ A Typical at Switch Off State
VOUT
VOUT
GND
FLG
(TOP VIEW)
2
3
4
SOP-8
8
7
6
5
IP
VIN
VIN
EN
RT9703
www.richtek.com
1

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RT9703PS Summary of contents

Page 1

Smart Universal Power Switch with Flag General Description The RT9703 is a low voltage, high performance single N-MOSFET power switch, designed for power rail on/off ≈ 80mΩ and full protection control with ...

Page 2

RT9703 Typical Application Circuit Supply Voltage Chip Enable Functional Pin Description Pin Name Pin Function VIN Power Input Voltage VOUT Output Voltage GND Ground EN Chip Enable (Active High) FLG Open-Drain Fault Flag Output IP Current Limit Programming Input Function ...

Page 3

Test Circuits SUPPLY V A VIN FLG RT9703 VOUT Chip Enable EN IP GND 3 V RDS(ON) V VOUT VIN C IN RT9703 V IN FLG EN GND Note: Above ...

Page 4

RT9703 Absolute Maximum Ratings Supply Voltage --------------------------------------------------------------------------------------------------------- 6.5V Chip Enable Input Voltage ------------------------------------------------------------------------------------------- Flag Voltage ------------------------------------------------------------------------------------------------------------ 6.5V Power Dissipation 25° SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.95W Package Thermal Resistance SOP-8, θ -------------------------------------------------------------------------------------------------------------- 104°C/W JA Junction Temperature ------------------------------------------------------------------------------------------------- ...

Page 5

Parameter Thermal Shutdown Protection Thermal Shutdown Hysteresis Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions ...

Page 6

RT9703 Typical Operating Characteristics 2 On-State Supply Current vs. Input Voltage 10uF Open 100kΩ SET 1.5 2 2.5 3 ...

Page 7

Current Limit vs 3.5 3 2.5 2 1 100 150 200 250 R SET 3 On-Resistance vs. Temperature 0.5A 50kΩ OUT SET C = 10uF 33uF ...

Page 8

RT9703 CE Threshold Voltage vs. Temperature EN Pin Threshold Voltage vs 100mV 10uF 33uF IN OUT 100kΩ SET 1.6 1.2 0.8 0.4 0 -40 ...

Page 9

UVLO Threshold vs. Temperature 3 10uF 33uF IN OUT R = 1kΩ 100kΩ SET 2.5 2 1.5 1 0.5 0 -40 - Temperature 1 Turn-Off Response Time (100us/Div) 4 ...

Page 10

RT9703 1 FLAG Response at Chip Enable V (5V/Div (5V/Div) FLG I (0.5A/Div) L Time (10ms/Div) 5 Short- Circuit with Thermal Shutdown 10uF 140kΩ ON, S3 ...

Page 11

Applications Information The RT9703 is a high-side, N-Channel, power switch available with active-high enable input. Low R 80mΩ and full protection functions make it optimized to replace complex discrete on/off control circuitry. Input and Output V (input) is the power ...

Page 12

RT9703 The normal current limit value, I LIMIT resistor between IP (pin 8) and GND (pin 4). When a heavy load or short circuit is applied to an enabled switch, a large transient current may flow until the current limit ...

Page 13

Fault Flag Filtering (Optional) The transient inrush current to downstream capacitance may cause a short-duration error flag, which may cause erroneous over-current reporting. A simple 1ms RC low- pass filter (10kΩ and 0.1μF) in the flag line eliminates short-duration transients. ...

Page 14

RT9703 Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com ...

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