MIC2544/2548
Micrel
Absolute Maximum Ratings
(Note 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
(Note 2)
Supply Voltage (V
IN
) ................................... +2.7V to +5.5V
Current Limit Set Range .................................. 0.1A to 1.5A
Ambient Temperature Range (T
A
) ............. –40°C to +85°C
Package Thermal Resistance
SOP
(θ
JA
) .......................................................... 160°C/W
MSOP
(θ
JA
) ....................................................... 206°C/W
Electrical Characteristics
V
IN
= +5V; T
A
= 25°C,
bold
indicates –40°C to +85°C; unless noted
Symbol
Parameter
Supply Current
Condition
switch off, OUT = open,
Note 4
switch on, OUT = open,
Note 4
V
EN
Enable Input Voltage
enable high,
Note 4
enable low,
Note 1
Enable Input Current
V
EN
= V
OH(min)
= 2.4V
V
EN
= V
OL(max)
= 0.8V
Enable Input Capacitance
R
DS(on)
Switch Resistance
Current Limit Factor
Note 6
I
OUT
= 500mA
I
OUT
= 100mA to 1A, V
OUT
= 1V to 4V,
Note 5
I
OUT
= 500mA to 1.5A, V
OUT
= 1V to 4V,
Note 5
Output Leakage Current
t
ON
t
R
t
OFF
t
F
Output Turn-On Delay
Output Turn-On Rise Time
Output Turnoff Delay
Output Turnoff Fall Time
Overtemperature Threshold
Shutdown
Error Flag Output Resistance
switch off
R
L
= 10Ω, C
L
= 1µF,
Figures 1a, 1b
R
L
= 10Ω, C
L
= 1µF,
Figures 1a, 1b
R
L
= 10Ω, C
L
= 1µF,
Figures 1a, 1b
R
L
= 10Ω, C
L
= 1µF,
Figures 1a, 1b
T
J
increasing
T
J
decreasing
V
IN
= 5V, I
L
= 10µA
V
IN
= 3.3V, I
L
= 10µA
Error Flag Off Current
EN Pulse Reset Width
V
IN
to EN Set-Up
Current-Limit Response Time
Overcurrent Flag Response Time
Note 1.
Note 2.
Note 3.
Note 4.
Min
Typ
0.75
75
Max
5
160
Units
µA
µA
V
2.4
1.7
1.5
0.01
0.01
1
80
120
276
299
10
5
5
0.8
1
1
V
µA
µA
pF
mΩ
V
V
µA
ms
ms
µs
µs
°C
°C
Ω
Ω
µA
µs
µs
µs
µs
184
161
230
230
1
1
1
2
2
22
21
140
130
4
5
0.01
15
20
1
V
FLG
= 5V
MIC2548 thermal shutdown latch
MIC2548,
Note 6
V
OUT
= 0V,
Note 6
V
OUT
= V
IN
/2 to FLG low
5
0
25
5
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.
230V
Current limit threshold is determined by
I
LIMIT
=
R
, where R
SET
is in ohms.
SET
Note 5.
Note 6.
Guaranteed by design but not production tested.
June 2000
3
MIC2544/2548
MICREL [ MICREL SEMICONDUCTOR ]
