MIC24085 Datasheet, PDF (3/16 Pages) Micrel Semiconductor – Integrated FET Buck Regulator

Micrel, Inc.
MIC24085
Absolute Maximum Ratings⁽¹⁾
V_VCC to PGND................................................ −0.3V to +20V
V_SW to PGND................................................. −0.3V to +20V
V_EN, V_FB, V_PG, to GND ..................................... −0.3V to + 6V
V_BST to V_SW ..................................................... −0.3V to + 6V
V_BST to PGND ................................................ −0.3V to +26V
PGND to GND ............................................. −0.3V to + 0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (T_S)......................... −65°C to +150°C
Lead Temperature (soldering, 10sec) ........................ 260°C
ESD Rating⁽³⁾.................................................................. 2kV
Operating Ratings⁽²⁾
Supply Voltage (V_VCC) ....................................... 4.5V to 18V
Output Current ................................................................ 3A
Junction Temperature (T_J) ........................ −40°C to +125°C
Junction Thermal Resistance
MLF-16 (θ_JA) ..................................................... 68°C/W
MLF-16 (θ_JC) .................................................... 7.5°C/W
Electrical Characteristics⁽⁴⁾
VVCC = 12V; TA = 25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Power Supply Input
VCC Input Voltage Range
Quiescent Supply Current
Shutdown Supply Current
VCC UVLO Threshold
VCC UVLO Hysteresis
Reference (MIC24085AYML)
No Switching, VFB = 1.5V
VEN = 0V
4.5
2.3
5
4.3
650
Feedback Reference Voltage
FB Bias Current
Soft-Start Time
-40°C ≤ TJ ≤ +125°C (±1.5%)
VFB = 0.6V
0.886
0.9
50
4
Load Regulation
Line Regulation
Enable Control
IOUT = 100mA to 3A
0.5
VVCC = 4.5V to 18V
0.5
EN Logic Level High
2.2
EN Logic Level Low
EN Hysteresis
480
VEN = 5V
3.5
EN Bias Current
VEN = 0V
-1.5
PWM
Switching Frequency
VFB = 0.9V
0.9
1.0
Foldback Switching Frequency
VFB < 60% × 0.9V
250
Maximum Duty Cycle
VFB = 0V, 1MHz
97
Minimum Duty Cycle
VFB = 1V
0
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
Max.
18
10
4.5
0.914
500
0.8
1.1
Units
V
mA
µA
V
mV
V
nA
ms
%
%
V
V
mV
µA
MHz
kHz
%
%
October 22, 2013
3
Revision 1.1