MIC2845 Datasheet, PDF (4/21 Pages) Micrel Semiconductor – 6 Channel High Side Current Source WLED driver

Micrel Inc.
MIC2845/46
Absolute Maximum Ratings⁽¹⁾
Main Input Voltage (V_IN) ................................... -0.3V to +6V
Enable/DC Input Voltage ................................. -0.3V to +6V
Current Source Voltage ………………………...-0.3V to +6V
Power Dissipation………………………..Internally Limited⁽³⁾
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (T_s) ..........................-65°C to +150°C
ESD Rating⁽⁴⁾.................................................................. 2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)..................................... +3.0V to +5.5V
Enable Input Voltage (V_EN1/2,V_DC,V_END) ................. 0V to V_IN
Current Source Voltage (V_D1-6) .............................. 0V to V_IN
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
MLF^® (θ_JA)..........................................................60°C/W
Electrical Characteristics
Linear Regulators
V_IN = V_EN1 = V_EN2 = 3.8V, V_DC (2846) V_END (2845) = 0V; C_OUT1/2 = 2.2µF, I_OUT1/2 = 100µA;
T_J = 25°C, bold values indicate –40°C ≤ T_J ≤ 125°C; unless noted.
Parameter
Conditions
Min
Output Voltage Accuracy
Variation from nominal V_OUT
-2
-3
V_IN Line Regulation
Load Regulation
I_OUT = 100μA to 150mA
Dropout Voltage
Ground Pin Current
V_OUT > = 3.0V; I_OUT = 150mA
I_OUT = 100μA to 150mA
Ground Pin Current in Shutdown V_EN < 0.2V, T_J < 85C
Ripple Rejection
f = up to 1kHz; C_OUT = 2.2μF
Current Limit
V_OUT = 0V
200
Output Voltage Noise
C_OUT = 2.2μF, 10Hz to 100kHz
Typ Max Units
+2
%
+3
%
0.02
0.3
%/V
6
10
mV
150
330
mV
25
40
µA
0.05
1.0
µA
65
dB
300
550
mA
58
V_RMS
Enable Inputs (EN1, 2)
Enable Input Voltage
Enable Hysterisis
Enable Input Current
Turn-on Time
Logic Low
Logic High
V_EN1/2 > 1.0V
C_OUT = 2.2µF; 90% of V_OUT
0.2
V
1.2
V
25
mV
0.01
1
µA
50
100
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. The maximum allowable power dissipation of any T_A (ambient temperature) is P_D(max) = T_J(max) – T_A) / θ_JA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model: 1.5kΩ in series with 100pF.
January 2008
4
M9999-010808-A