MIC2874 Datasheet, PDF (3/22 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
MIC2874
Absolute Maximum Ratings⁽²⁾
Input Voltage (V_IN) ........................................ −0.3V to +6.0V
General I/O Voltage (V_FEN) ................................ −0.3V to V_IN
V_OUT and V_LED Voltage.................................. −0.3V to +6.0V
Single-Wire I/O Voltage (V_DC) ........................... −0.3V to V_IN
V_SW Voltage .................................................. −0.3V to +6.0V
Lead Temperature (soldering, 10sec.) ..................... +260°C
Junction Temperature (T_J) ........................ −40°C to +150°C
Storage Temperature (T_s) ......................... −40°C to +150°C
ESD Rating⁽⁵⁾
HBM ......................................................................... 2kV
MM ......................................................................... 200V
Operating Ratings⁽³⁾
Input Voltage (V_IN) ........................................ +2.7V to +5.5V
Enable Input Voltage (V_FEN) ................................... 0V to V_IN
Single-Wire I/O Voltage (V_DC) ................................ 0V to V_IN
Junction Temperature (T_J) ........................ −40°C to +125°C
Operating Ambient Temperature (T_A) ......... −40°C to +85°C
Package Thermal Resistance
1.30mm x 1.30mm WLCSP (θ_JA)⁽⁴⁾ .................... 84°C/W
Power Dissipation (P_D) ........................... Internally Limited⁽⁴⁾
Electrical Characteristics⁽⁶⁾
V_IN = 3.6V; L = 0.47µH; C_OUT = 4.7µF, I_OUT = 100mA, T_A = 25°C, bold values indicate –40°C≤ T_J ≤ +125°C, unless otherwise noted.
Symbol Parameter
Condition
Min.
Typ.
Max.
Units
Power Supply
V_IN
V_UVLO
Supply Voltage Range
UVLO Threshold (rising)
UVLO Hysteresis
2.7
5.5
V
2.41
2.53
2.68
V
180
mV
I_STB
Standby Current
V_DC = 3.6V, V_FEN = 0V, boost regulator and LED
current driver both OFF.
150
185
220
µA
I_SD
Shutdown Current
V_DC = 0V
1
2
µA
D_MAX
Maximum Duty Cycle
82
86
90
%
D_MIN
Minimum Duty Cycle
6.4
%
I_SW
Switch Current Limit
V_IN = V_OUT = 2.7V
4.1
A
PMOS
NMOS
Switch On-Resistance
I_SW = 100mA
I_SW = 100mA
125
mΩ
I_{SW_LK}
Switch Leakage Current
V_DC = 0V, V_SW = 5.5V
0.01
1
µA
F_SW
Oscillator Frequency
3.6
4
4.4
MHz
Notes:
2. Exceeding the absolute maximum rating may damage the device.
3. The device is not guaranteed to function outside its operating rating.
4. 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.
5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
August 26, 2014
3
Revision 1.0