MIC2544_10 Datasheet, PDF (4/14 Pages) Micrel Semiconductor – Programmable Current Limit High-Side Switch

Micrel, Inc.
MIC2544/2548
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) ....................................................+7.0V
Output Voltage (V_OUT) .................................................+7.0V
Output Current (I_OUT) .................................Internally Limited
Enable Input (V_EN) .................................. –0.3V to VIN+0.3V
Fault Flag Voltage (V_FLG).............................................+7.0V
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⁽³⁾.................................................................. 2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)..................................... +2.7V to +5.5V
Current Limit Set Range................................... 0.1A to 1.5A
Ambient Temperature (T_A) .......................... –40°C to +85°C
Package Thermal Resistance
SOIC (θ_JA) ........................................................160°C/W
MSOP (θ_JA) ......................................................206°C/W
Electrical Characteristics
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
Condition
Switch off, OUT = open⁽⁴⁾
Switch on, OUT = open⁽⁴⁾
Enable high⁽⁴⁾
Enable low⁽¹⁾
Min Typ Max Units
#
0.75
5
μA
75
160
μA
2.4
1.7
V
1.5
0.8
V
Enable Input Capacitance
Note 5
1
pF
R_DS(on)
Switch Resistance
Current Limit Factor
I_OUT = 500mA
80
120
mΩ
I_OUT = 100mA to 1A, V_OUT=1V to 4V⁽⁶⁾
184 230
276
V
I_OUT = 500mA to 1.5A, V_OUT=1V to 4V⁽⁶⁾
161
230
299
V
Output Leakage Current
Switch off
1
10
μA
t_ON
Output Turn-On Delay
R_L = 10Ω, C_L = 1μF, Figures 1a, 1b
1
2
5
ms
T_R
Output Turn-On Rise Time
R_L = 10Ω, C_L = 1μF, Figures 1a, 1b
1
2
5
ms
T_OFF
Output Turn-Off Delay
R_L = 10Ω, C_L = 1μF, Figures 1a, 1b
22
μs
T_F
Output Turn-Off Fall Time
R_L = 10Ω, C_L = 1μF, Figures 1a, 1b
21
μs
Overtemperature Threshold Shutdown
T_J increasing
T_J decreasing
140
°C
130
°C
Error Flag Output Resistance
V_IN = 5V, I_L = 10μA
V_IN = 3.3V, I_L = 10μA
4
15
Ω
5
20
Ω
Error Flag Off Current
V_FLG = 5V
0.01
1
μA
EN Pulse Reset Width
MIC2548 thermal shutdown latch
5
μs
V_IN to EN Set-Up
MIC2548⁽⁶⁾
0
μs
Current-Limit Response Time
V_OUT = 0V⁽⁶⁾
25
μs
Overcurrent Flag Response Time
V_OUT = V_IN/2 to FLG low
5
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. 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.
5. Guaranteed by design but not production tested.
6.
Current
limit
threshold
is
determined
by
I_LIMIT
=
230V
R_SET
,
where
R_SET
is
in
ohms.
April 2010
4
M9999-043010