MIC2545A Ver la hoja de datos (PDF) - Micrel
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MIC2545A Datasheet PDF : 18 Pages
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Micrel, Inc.
MIC2545A/2549A
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ....................................................+7.0V
Output Voltage (VOUT). ................................................+7.0V
Output Current (IOUT) .................................Internally Limited
Enable Input (VEN) ........................................... −0.3V to +7V
Fault Flag Voltage (VFLG).............................................+7.0V
Fault Flag Current (IFLG) ..............................................50mA
Storage Temperature (Ts).........................–65°C to +150°C
Junction Temperature (TJ) ........................Internally Limited
Lead Temperature (soldering, 5sec.)......................... 260°C
ESD Rating(3)..............................................................1500V
Operating Ratings(2)
Supply Voltage (VIN)..................................... +2.7V to +5.5V
Ambient Temperature (TA) .......................... –40°C to +85°C
Package Thermal Resistance
PDIP (θJA) ........................................................130°C/W
SOIC (θJA) ........................................................160°C/W
TSSOP (θJA)(4)..................................................100°C/W
Current-Limit Set Range(5) .................................. 0.5A to 3A
Electrical Characteristics(4)
VIN = +5V; TA = 25°C, bold values indicate –40°C to +85°C, unless noted.
Symbol Parameter
Condition
Switch Off, OUT = Open(6)
Min.
Typ.
0.75
Max.
5
Units
µA
Supply Current
VEN
Enable Input Voltage
Switch On, OUT = Open(6)
Enable High Transition(6)
Enable Low Transition(6)
90
125
µA
150
2.4
1.6
V
1.5
0.8
Enable Input Current
VEN = VOH(MIN) = 2.4V
VEN = VOL(MAX) = 0.8V
0.01
1
µA
0.01
1
Enable Input Capacitance
Note 7
1
pF
RDS(ON)
Switch Resistance
Current-Limit Factor
IOUT = 500mA
ILIMIT = 0.5A to 3A, VOUT = 1V to 4V(5)
ILIMIT = 1A to 2.5A, VOUT = 1V to 4V(5)
35
50
mΩ
184 230
276
V
195 230
264
Output Leakage Current
Switch Off, VOUT = 0V
1
10
µA
tON
Output Turn-On Delay
RL = 10Ω, CL = 1µF, Figures 1a, 1b
1
2
5
ms
tR
Output Turn-On Rise Time
RL = 10Ω, CL = 1µF, Figures 1a, 1b
0.75 1.8
4.9
ms
tOFF
Output Turn-Off Delay
RL = 10Ω, CL = 1µF, Figures 1a, 1b
25
µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Assumes 4-layer PCB is used.
230
5. Current limit is determined by ILIMIT =
, where RSET is in Ωs, and 230 is typical current-limit factor in volts.
R SET
6. Off is ≤ 0.8V and on is ≥ 2.4V for the MIC2545A-1 and MIC2549A-1. Off is ≥ 2.4V and on is ≤ 9.8V for the MIC2545A-2 and MIC2549A-2. The
enable input has about 100mV of hysteresis.
7. Guaranteed by design but not production tested.
June 2011
4
M9999-062711-A
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