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PDF UP7534 Data sheet ( Hoja de datos )
| Número de pieza | UP7534 | |
| Descripción | Power Distribution Switches | |
| Fabricantes | uPI Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UP7534 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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uP7534
Current-Limited, Power Distribution Switches
General Description
Features
The uP7534 is a current limited high-side switch designed
for applications where heavy capacitive loads and short-
circuits are likely to be met. This device operates with
inputs from 2.7V to 5.5V for both 3V and 5V systems. Its
low quiescent current (25uA) and standby current (<1uA)
conserve battery power in portable.
The power switch is controlled by a logic enable input and
driven by an internal charge pump circuit. When the output
load exceeds the current-limit threshold or a short is
present, the uP7534 asserts overcurrent protection and
limits the output current to a safe level by driving the power
switch into saturation mode.
The uP7534 features glitch-blank fault flag that is asserted
by overcurrent, overtemperature, or input undervoltage
lockout. The 8ms glitch-blanking time allows momentary
faults to be ignored, thus preventing false alarms to the
host system.
Other 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. The uP7534 is available in
SOP-8 , SOT23-5, MSOP-8, and PMSOP-8 packages.
Compliant to USB Specifications
Operating Range: 2.7 V to 5.5 V
90mΩ (5V Input) High Side MOSFET Switch
25uA Typical Quiescent Current
<1uA Typical Shutdown Current
Over Current/ Short Circuit Protect
Thermal Shutdown Protection
Deglitched Open Drain Fault Flag
Slow Turn On and Fast Turn Off
Enable Active-High or Active-Low
Pb-Free (RoHS Compliant)
UL Approved-E316940
TuV EN60960-1 Certification
Applications
Notebook and Desktop PCs
USB Power Management
ACPI Power Distribution
Hot-Plug Power Supplies
Battery-Powered Equipmentswww.DataSheet.co.kr
Battery-Charger Circuits
Pin Configuration
OC#
1
5 VOUT VOUT 1
5 VOUT VOUT 1
5 VOUT VOUT 1
5
VIN
GND
2
(uP7534C) EN
(uP7534D) EN#
34
SOT23-5 (MA5)
VIN
GND
2
VIN 3
4 EN
SOT23-5 (M5)
GND
2
GND
2
VIN 3
4 VIN
SOT23-5 (M5)
NC 3
4
SOT23-5 (MA5)
EN(uP7534E)
EN#(uP7534F)
VOUT
1
5
GND
2
OC#
34
SOT23-5 (MA5)
VIN
EN(uP7534G)
EN#(uP7534H)
OC#
VOUT
VOUT
GND
18
27
36
45
SOP-8 (S8)
NC
VIN
VIN
EN (uP7534A)
EN# (uP7534B)
GND
VIN
VIN
(uP7534C) EN}
(uP7534D) EN#
18
27
36
45
SOP-8 (SA8)
VOUT
VOUT
VOUT
OC#
GND
VIN
VIN
(uP7534A) EN
(uP7534B) EN#
1
2
3
4
MSOP-8 (RA8)
8 VOUT
7 VOUT
6 VOUT
5 OC#
GND
VIN
VIN
(uP7534A) EN
(uP7534B) EN#
1
2
3 GND
4
PMSOP-8 (RU8)
8 VOUT
7 VOUT
6 VOUT
5 OC#
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP7534-DS-F0200
1
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
uP7534
Absolute Maximum Rating
Supply Input Voltage, VIN (Note 1)
DC ------------------------------------------------------------------------------------------------------------------------------------ -0.3V to +6V
< 200us, non-repetitive ------------------------------------------------------------------------------------------------------- -0.3V to +10V
Other Pins ------------------------------------------------------------------------------------------------------------------------------------- -0.3V to +6V
Storage Temperature Range ----------------------------------------------------------------------------------------------------------- -65OC to +150OC
Junction Temperature ------------------------------------------------------------------------------------------------------------------------------------ 150OC
Lead Temperature (Soldering, 10 sec) ------------------------------------------------------------------------------------------------------------ 260OC
ESD Rating (Note 2)
HBM (Human Body Mode) --------------------------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------------------------------------------- 200V
Thermal Information
Package Thermal Resistance (Note 3)
SOP-8 θJA ------------------------------------------------------------------------------------------------------------------------------- 160°C/W
SOP-8 θJC ------------------------------------------------------------------------------------------------------------------------------- 39°C/W
SOT23-5 θJA ------------------------------------------------------------------------------------------------------------------------------- 250°C/W
SOT23-5 θJC ------------------------------------------------------------------------------------------------------------------------------ 50°C/W
MSOP-8 θJA ------------------------------------------------------------------------------------------------------------------------------ 160°C/W
MSOP-8 θJC ------------------------------------------------------------------------------------------------------------------------------- 40°C/W
PMSOP-8 θJA ------------------------------------------------------------------------------------------------------------------------- 86°C/W
PMSOP-8 θJC --------------------------------------------------------------------------------------------------------------------------- 30°C/W
Power Dissipation, PD @ TA = 25°C
SOP-8 ------------------------------------------------------------------------------------------------------------------------------------------ 0.625W
SOP23-5 ------------------------------------------------------------------ww-w.Dat-aShee-t.co.kr--------------------------------------------------------------------- 0.4W
MSOP-8 ------------------------------------------------------------------------------------------------------------------------------------------ 0.625W
PMSOP-8 ------------------------------------------------------------------------------------------------------------------------------------------- 1.16W
Recommended Operation Conditions
Operating Junction Temperature Range (Note 4) ------------------------------------------------------------------------ -40°C to +125°C
Operating Ambient Temperature Range -------------------------------------------------------------------------------------- -40°C to +85°C
Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------------ +2.7V to +5.5V
Electrical Characteristics
(VIN= 5V, TA = 25OC, unless otherwise specified)
Parameter
Symbol Test Conditions
Min Typ Max Units
Supply Input
Suppy Input Voltage
2.7 -- 5.5 V
Under Voltage Lockout
UVLO Hysteresis
Shutdown Current
Quiescent Current
VUVLO
∆VUVLO
ISD
IQ
VIN rising
No load on VOUT, Disabled
No load on VOUT, Enabled
-- 2.2 2.5 V
-- 75 -- mV
-- 0.1 1 uA
-- 25 50 uA
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP7534-DS-F0200
5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
uP7534
Application Information
Supply Input Filtering
VIN pins supply power to the power switch and internal
circuit. Both of them should be connect to upstrem power
supply with short and wide trace on the PCB.
Events such as hot-plug/unplug, output short circuit and
overtemperature result in step change of input current with
sharp edges, which in turn causes voltage transient at supply
input due to di/dit effect of parasitic inductance on the current
path. A 0.1uF ceramic capacitor from VIN to GND, physically
located near the device is strongly recommended to control
the supply input transient. Minimizing the parasitic
inductance along the current path also alleviate the voltage
transient at the supply input.
Output Voltage Filtering
Bypassing the output voltage with a 0.1uF ceramic capacitor
improves the immunity of the device against output short
circuit and hot plug/unplug of load. A lower ESR capacitor
results in lower voltage drop against a step load change. A
large electrolytic capacitor from VOUT to GND is also
recommended. This capacitor reduces power supply
transient that may cause ringing on the input.
USB supports dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads are
recommended in series with all power and ground connector
pins. Ferrite beads reduce EMI and limit the inrush current
during hot-attachment by filtering high-frequency signals.
The DC resistance of the ferrite bead should be specially
taken care to reduce the voltage drop.
Voltage Drop and Power Dissipation
Temperature effect should be well considered when dealing
with voltage drop and power dissipation. The maximum
RDS(ON) of the power switch is 100mΩ under 25OC junction
temperature. If the device is expected to operate at 125OC
junction temperature, the RDS(ON) will become
100mΩ * (1 + (125OC - 25OC) * 0.5%/OC) = 150mΩ
where 0.5%/OC is the approximated temperature coefficient
of the RDS(ON).
If the maximum load current is expected to be 1.2A, the
maximum voltage will become
1.2A * 150mΩ = 180mV
This in turn will cause power dissipation as
1.2A * 180mV = 215mW
The temperature raise is calculated as
215mW * 160 OC/W = 35OC
The junction temperature is calculated as TA + 35OC, where
TA is the expected maximum ambient temperature. A few
iterations are required until get final solutions.
Layout Consideration
The power circuitry of usb printed circuit boards requires
a customized layout to maximize thermal dissipation and
to minimized voltage drop and EMI
Place the device physically as close to the USB port
as possible. Keep all traces wide, short and direct
to minimized the parasitic inductance. This
optimizes the switch response time to output short
circuit conditions.
Place both input and output bypass capacitors near
to the device.
If ferrite beads are used, use wires with minimum
resistance and large solder pads to minimize
connection resistance.
All VOUT pins should be connected together on the
PCB. All VIN pins should be connected together on
the PCB.
GND
GNDBUS
www.DataSheet.co.kr
VIN
EN#
VOUT
OC#
VBUS
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP7534-DS-F0200
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet UP7534.PDF ] | |
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