MIC2546 Datasheet, PDF (3/12 Pages) Micrel Semiconductor – Dual Programmable Current Limit Switch Preliminary Information

MIC2546/2547
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 ..................................... 0.1 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
V_IN = +5V; T_A = 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
1.5
10
µA
Switch on, OUT = open, Note 4
200 320
µA
V_EN
Enable Input Voltage
Enable High, Note 4
Enable Low, Note 4
2.4
1.7
V
1.5
0.8
V
Enable Input Current
Enable Input Capacitance
V_EN = V_OH(min) = 2.4V
V_EN = V_OL(max) = 0.8V
Note 5
.01
1
µA
.01
1
µA
1
pF
R_DS(on)
Switch Resistance
Current Limit Factor, Note 6
I_OUT = 500mA
80
120 mΩ
I_OUT = 100mA to 1.5A, V_OUT = 1.0V to 4.0V, 184 230 276
V
Note 6
Output Leakage Current
Switch off
1
10
µA
t_ON
Output Turn-On Delay
R_L = 10Ω, C_L = 1µF, Figure 1a and 1b
1
2
5
ms
t_R
Output Turn-On Rise Time
R_L = 10Ω, C_L = 1µF, Figure 1a and 1b
1
2
5
ms
t_OFF
Output Turnoff Delay
R_L = 10Ω, C_L = 1µF, Figure 1a and 1b
22
µs
t_F
Output Turnoff Fall Time
R_L = 10Ω, C_L = 1µF, Figure 1a and 1b
21
µs
Overtemperature Threshold
T_J increasing
140
°C
Shutdown
T_J decreasing
130
°C
Error Flag Output Resistance
V_IN = 5V, I_L = 10µA
4
15
Ω
V_IN = 3.3V, I_L = 10µA
5
20
Ω
Error Flag Off Current
V_FLG = 5V
0.01
1
µA
EN Pulse Reset Width
MIC2547 Thermal Shutdown Latch
5
µs
V_IN to EN Set-Up
Current-Limit Response Time
Overcurrent FLG Response Time
MIC2547, Note 5
V_OUT = 0V
V_OUT = V_IN/2 to FLG low
0
µs
25
µs
5
µs
Note 1.
Note 2.
Note 3.
Note 4.
Note 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 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.
Guaranteed by design, but not production tested.
Note 6.
Current
limit
threshold
is
determined
by:
I_LIMIT
=
230V
R_SET ^,
where
R_SET
is
in
ohms.
June 2000
3
MIC2546/2547