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st2051 の電気的特性と機能

st2051のメーカーはSTMicroelectronicsです、この部品の機能は「Enhanced power switch」です。


製品の詳細 ( Datasheet PDF )

部品番号 st2051
部品説明 Enhanced power switch
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




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st2051 Datasheet, st2051 PDF,ピン配置, 機能
ST2051
Enhanced power switch
Features
90mhigh-side MOSFET switch
500mA continuos current per channel
Thermal and short-circuit protection with
overcurrent logic output
www.DataSheOept4eUr.actoinmg range from 2.7V to 5.5V
CMOS- and TTL-compatible enable inputs
2.5ms typical rise time
Under voltage lock out
10µA Maximum standby supply current
Ambient temperature range, 0°C to 85°C
2kV ESD protection
Fault-blanking
Description
The ST2051 power distribution switch is intended
for applications where heavy capacitive loads and
short circuits are likely to be encountered. These
devices incorporate 90mN-channel MOSFET
high-side power switches for power-distribution.
The switch is controlled by a logic enable input.
Gate drive is provided by an internal charge pump
designed to control the power-switch rise times
and fall times to minimize current surges during
switching. The charge pump requires no external
components and allows operation from supplies
as low as 2.7V.
SO-8
When the output load exceeds the current-limit
threshold or a short is present, the device limits
the output current to a safe level by switching into
a constant-current mode, pulling the overcurrent
logic output low. When continuous heavy
overloads and short circuits increase the power
dissipation in the switch, causing the junction
temperature to rise, a thermal protection circuit
shuts off the switch to prevent damage. Recovery
from a thermal shutdown is automatic once the
device has cooled sufficiently. Internal circuitry
ensures the switch remains off until valid input
voltage is present.
Order codes
Part number
ST2051BDR
August 2006
Package
SO-8
Rev1
Packaging
Tape and reel
1/11
www.st.com
11

1 Page





st2051 pdf, ピン配列
ST2051
Schematic diagram and pin connections
1 Schematic diagram and pin connections
Figure 1. Schematic diagram
www.DataSheet4U.com
Figure 2. Pin connections (top view)
Table 1.
Pin
1
2
3
4
5
6
7
8
Pin functions
Name
Type
GND
IN1
IN2
EN
OC
OUT3
OUT2
OUT1
-
-
-
I
O
-
-
-
Description
Ground
VCC input, 2.7-5.5V
VCC input, 2.7-5.5V
Enable (Active Hi)
Open drain output for fault indication
Output
Output
Output
3/11


3Pages


st2051 電子部品, 半導体
Electrical characteristics
4 Electrical characteristics
ST2051
Table 4.
Symbol
Electrical characteristics (TJ = 25°C, VI = 5.0V)
Parameter
Test conditions
VI = 3.3V; -40 < TJ < 125°C
Static Drain-Source
RDS(on) ON-State Resistance
VI = 5.0V; -40 < TJ < 125°C
VI = 3.3V; TJ = 25°C
VI = 5.0V; TJ = 25°C
www.DataSheet4U.com
tr
tf
Output rise time (1)
Output fall time (1)
TON
TOFF
Turn-ON time (1)
Turn-OFF time (1)
VI = 5.5V, RL = 10Ω, CL = 1µF
VI = 2.7V, RL = 10Ω, CL = 1µF
VI = 5.5V, RL = 10Ω, CL = 1µF
VI = 2.7V, RL = 10Ω, CL = 1µF
RL = 10Ω, CL = 100µF
RL = 10, CL = 100µF
1. Not tested in production, specified by design
Min.
Typ. Max.
100 145
90 135
90 130
80 110
2.5
3
0.3
0.2
20
40
Unit
m
ms
ms
ms
ms
ms
ms
Table 5.
Symbol
Current limit characteristics
(VI = 5.5V, IO = rated current, TJ = 25°C, unless otherwise specified.)
Parameter
Test conditions
Min. Typ. Max.
Unit
IOS
Short circuit output
current
VI = 5V, OUT Connected to
GND, device enabled into
short circuit
0.7 1.0 1.3 A
Table 6.
Symbol
Supply current characteristics
(VI = 5.5V, IO = rated current, TJ = 25°C, unless otherwise specified.)
Parameter
Test conditions
Min. Typ. Max.
IOFF Switch turned OFF
ION Switch turned ON
Ileakage Output leakage current
No load
No load; -40 < TJ < 125°C
No load
No load; -40 < TJ < 125°C
Output grounded, switch is
OFF
Output grounded, switch is
OFF; -40 < TJ < 125°C
1.0 5.0
10
70 90
100
10
20
Unit
µA
µA
µA
µA
µA
µA
6/11

6 Page



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共有リンク

Link :


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