Micrel, Inc.
MIC2546/2547
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ...................................................+6.0V
Output Voltage (V
OUT
) ................................................+6.0V
Output Current (I
OUT
) ................................Internally Limited
Enable Input (V
EN
) ................................. –0.3V to V
IN
+0.3V
Fault Flag Voltage (V
FLG
)............................................+6.0V
Fault Flag Current (I
FLG
) .............................................50mA
Storage Temperature (T
S
) ........................–65°C to +150°C
Junction Temperature (T
J
) ........................Internally Limited
Lead Temperature (soldering 5 sec.)......................... 260°C
ESD Rating,
Note 3 .......................................................
2kV
Operating Ratings
(2)
Supply Voltage (V
IN
) .................................... +2.7V to +5.5V
Current Limit Set Range......................................0.1 to 1.5A
Ambient Temperature Range (T
A
) .............. –40°C to +85°C
Package Thermal Resistance
SOP (θ
JA
) .........................................................120°C/W
TSSOP (θ
JA
) ....................................................100°C/W
Electrical Characteristics
(4)
V
IN
= +5V; T
A
= 25°C,
bold
values indicate –40°C to +85°C, unless noted.
Symbol
Parameter
Supply Current
V
EN
Enable Input Voltage
Enable Input Current
Enable Input Capacitance
R
DS(ON)
Switch Resistance
Current Limit Factor,
Note 6
Output Leakage Current
t
ON
t
R
t
OFF
t
F
Output Turn-On Delay
Output Turn-On Rise Time
Output Turn-Off Delay
Output Turn-Off Fall Time
Overtemperature Threshold
Shutdown
Error Flag Output Resisitance
Error Flag Off Current
EN Pulse Reset Width
V
IN
to EN Set-Up
Current-Limit Response Time
Overcurrent FLG Response
Time
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.
Condition
Switch off, OUT = open,
Note 4
Switch on, OUT = open,
Note 4
Enable High,
Note 4
Enable Low,
Note 4
V
EN
= V
OH(MIN)
= 2.4V
V
EN
= V
OH(MAX)
= 0.8V
Note 5
I
OUT
= 500mA
I
OUT
= 500mA to 1.5A, V
OUT
= 1.0V to 4.0V
Note 6
Swich off
R
L
= 10Ω, C
L
= 1µF,
Figure 1a and 1b
R
L
= 10Ω, C
L
= 1µF,
Figure 1a and 1b
R
L
= 10Ω, C
L
= 1µF,
Figure 1a and 1b
R
L
= 10Ω, C
L
= 1µF,
Figure 1a and 1b
T
J
increasing
T
J
decreasing
V
IN
= 5V, I
L
= 10µA
V
IN
= 3.3V, I
L
= 10µA
V
FLG
= 5V
MIC2547 Thermal Shutdown Latch
MIC2547,
Note 5
V
OUT
= oV
V
OUT
= V
IN
/2 to FLG low
Min
Typ
1.5
200
Max
10
320
0.8
1
1
120
276
10
5
5
Units
µA
µA
V
V
µA
µA
pF
mΩ
V
µA
ms
ms
µs
µs
°C
°C
2.4
1.7
1.5
0.01
0.01
1
80
184
230
1
1
1
2
2
22
21
140
130
4
5
0.01
15
20
1
Ω
Ω
µA
µs
µs
5
0
25
5
µs
µs
January 2008
4
M9999-012508-A
MICREL [ MICREL SEMICONDUCTOR ]
