MIC2546 Просмотр технического описания (PDF) - Micrel
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MIC2546 Datasheet PDF : 15 Pages
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Micrel, Inc.
MIC2546/2547
Absolute Maximum Ratings(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
Operating Ratings(2)
Supply Voltage (VIN) .................................... +2.7V to +5.5V
Current Limit Set Range......................................0.1 to 1.5A
Ambient Temperature Range (TA) .............. –40°C to +85°C
Package Thermal Resistance
SOP (θJA) .........................................................120°C/W
TSSOP (θJA) ....................................................100°C/W
Electrical Characteristics(4)
VIN = +5V; TA = 25°C, bold values indicate –40°C to +85°C, unless noted.
Symbol Parameter
Condition
Supply Current
Switch off, OUT = open, Note 4
Switch on, OUT = open, Note 4
VEN
Enable Input Voltage
Enable High, Note 4
Enable Low, Note 4
Enable Input Current
VEN = VOH(MIN) = 2.4V
Enable Input Capacitance
VEN = VOH(MAX) = 0.8V
Note 5
RDS(ON)
Switch Resistance
Current Limit Factor, Note 6
IOUT = 500mA
IOUT = 500mA to 1.5A, VOUT = 1.0V to 4.0V
Note 6
Output Leakage Current
Swich off
tON
Output Turn-On Delay
RL = 10Ω, CL = 1µF, Figure 1a and 1b
tR
Output Turn-On Rise Time
RL = 10Ω, CL = 1µF, Figure 1a and 1b
tOFF
Output Turn-Off Delay
tF
Output Turn-Off Fall Time
RL = 10Ω, CL = 1µF, Figure 1a and 1b
RL = 10Ω, CL = 1µF, Figure 1a and 1b
Overtemperature Threshold
Shutdown
TJ increasing
TJ decreasing
Error Flag Output Resisitance VIN = 5V, IL = 10µA
VIN = 3.3V, IL = 10µA
Error Flag Off Current
VFLG = 5V
EN Pulse Reset Width
MIC2547 Thermal Shutdown Latch
VIN to EN Set-Up
MIC2547, Note 5
Current-Limit Response Time
VOUT = oV
Overcurrent FLG Response
Time
VOUT = VIN/2 to FLG low
Min Typ Max Units
1.5
10
µA
200
320
µA
2.4
1.7
V
1.5
0.8
V
0.01
1
µA
0.01
1
µA
1
pF
80
120
mΩ
184 230
276
V
1
10
µA
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
0
µs
25
µs
5
µs
Notes:
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4. Off is ″ 0.8V and on is ≥ 2.4V for the MIC2546-1 and MIC2547-1. Off is ≥ 2.4V and on is ″ 0.8V for the MIC2546-2 and MIC2547-2. The enable
input has about 200mV of hysteresis.
January 2008
4
M9999-012508-A
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