MIC2544(2000) Ver la hoja de datos (PDF) - Micrel
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MIC2544 Datasheet PDF : 12 Pages
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MIC2544/2548
Absolute Maximum Ratings (Note 1)
Supply Voltage (VIN) .................................................. +6.0V
Output Voltage (VOUT) ............................................... +6.0V
Output Current (IOUT) ............................... Internally Limited
Enable Input (VEN) ................................. –0.3V to VIN+0.3V
Fault Flag Voltage (VFLG) ........................................... +6.0V
Fault Flag Current (IFLG) ............................................ 50mA
Storage Temperature (TS) ....................... –65°C to +150°C
Junction Temperature (TJ) ....................... Internally Limited
Lead Temperature (soldering 5 sec.) ........................ 260°C
ESD Rating, Note 3 ...................................................... 2kV
Micrel
Operating Ratings (Note 2)
Supply Voltage (VIN) ................................... +2.7V to +5.5V
Current Limit Set Range .................................. 0.1A to 1.5A
Ambient Temperature Range (TA) ............. –40°C to +85°C
Package Thermal Resistance
SOP (θJA) .......................................................... 160°C/W
MSOP (θJA) ....................................................... 206°C/W
Electrical Characteristics
VIN = +5V; TA = 25°C, bold indicates –40°C to +85°C; unless noted
Symbol
Parameter
Condition
Min Typ Max Units
Supply Current
switch off, OUT = open, Note 4
0.75
5
µA
switch on, OUT = open, Note 4
75
160
µA
VEN
Enable Input Voltage
enable high, Note 4
enable low, Note 1
2.4
1.7
V
1.5
0.8
V
Enable Input Current
Enable Input Capacitance
VEN = VOH(min) = 2.4V
VEN = VOL(max) = 0.8V
Note 6
0.01
1
µA
0.01
1
µA
1
pF
RDS(on)
Switch Resistance
Current Limit Factor
Output Leakage Current
IOUT = 500mA
80
120 mΩ
IOUT = 100mA to 1A, VOUT = 1V to 4V, Note 5
184
230
276
V
IOUT = 500mA to 1.5A, VOUT = 1V to 4V, Note 5 161
230
299
V
switch off
1
10
µA
tON
Output Turn-On Delay
RL = 10Ω, CL = 1µF, Figures 1a, 1b
tR
Output Turn-On Rise Time
RL = 10Ω, CL = 1µF, Figures 1a, 1b
tOFF
Output Turnoff Delay
RL = 10Ω, CL = 1µF, Figures 1a, 1b
tF
Output Turnoff Fall Time
RL = 10Ω, CL = 1µF, Figures 1a, 1b
Overtemperature Threshold
TJ increasing
Shutdown
TJ decreasing
Error Flag Output Resistance
VIN = 5V, IL = 10µA
VIN = 3.3V, IL = 10µA
Error Flag Off Current
VFLG = 5V
EN Pulse Reset Width
MIC2548 thermal shutdown latch
1
2
5
ms
1
2
5
ms
22
µs
21
µs
140
°C
130
°C
4
15
Ω
5
20
Ω
0.01
1
µA
5
µs
VIN to EN Set-Up
Current-Limit Response Time
Overcurrent Flag Response Time
MIC2548, Note 6
VOUT = 0V, Note 6
VOUT = VIN/2 to FLG low
0
µs
25
µs
5
µs
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Off is ≤ 0.8V and on is ≥ 2.4V for the MIC2544-1 and MIC2548-1. Off is ≥ 2.4V and on is ≤ 0.8V for the MIC2544-2 and MIC2548-2. The
enable input has about 200mV of hysteresis.
Note 5.
Note 6.
Current
limit
threshold
is
determined
by
ILIMIT
=
230V
RSET
,
where
RSET
is
in
ohms.
Guaranteed by design but not production tested.
June 2000
3
MIC2544/2548
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