MIC24054 Datasheet, PDF (4/30 Pages) Micrel Semiconductor – 12V, 9A High-Efficiency Buck Regulator

Micrel, Inc.
MIC24054
Absolute Maximum Ratings⁽¹⁾
PVIN to PGND............................................... −0.3V to +29V
VIN to PGND ................................................. −0.3V to PVIN
PVDD, VDD to PGND ..................................... −0.3V to +6V
V_SW, V_CS to PGND .............................−0.3V to (PVIN +0.3V)
V_BST to V_SW ........................................................ −0.3V to 6V
V_BST to PGND .................................................. −0.3V to 35V
V_FB, V_PG to PGND............................. −0.3V to (VDD + 0.3V)
V_EN to PGND .......................................−0.3V to (VIN +0.3V)
PGND to SGND............................................ −0.3V to +0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (T_S)......................... −65°C to +150°C
Lead Temperature (soldering, 10s)............................ 260°C
ESD Rating^(2). ................................................ ESD Sensitive
Operating Ratings⁽³⁾
Supply Voltage (PVIN, VIN) .............................. 4.5V to 19V
PVDD, VDD Supply Voltage (PVDD, VDD) ..... 4.5V to 5.5V
Enable Input (V_EN) .................................................. 0V to V_IN
Junction Temperature (T_J) ........................ −40°C to +125°C
Maximum Power Dissipation......................................Note 4
Package Thermal Resistance⁽⁴⁾
5mm x 6mm QFN-28 (θ_JA) ................................ 28°C/W
Electrical Characteristics⁽⁵⁾
PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ. Max. Units
Power Supply Input
Input Voltage Range (VIN, PVIN)
4.5
19
V
Quiescent Supply Current
VFB = 1.5V (non-switching)
450
750
µA
Shutdown Supply Current
VDD Supply Voltage
VEN = 0V
5
10
µA
VDD Output Voltage
VIN = 7V to 19V, IDD = 25mA
4.8
5
5.4
V
VDD UVLO Threshold
VDD Rising
3.7
4.2
4.5
V
VDD UVLO Hysteresis
400
mV
Dropout Voltage (VIN – VDD)
DC/DC Controller
IDD = 25mA
380
600
mV
Output-Voltage Adjust Range (VOUT)
Reference
0.8
5.5
V
Feedback Reference Voltage
0°C ≤ TJ ≤ 85°C (±1.0%)
−40°C ≤ TJ ≤ 125°C (±1.5%)
0.792
0.788
0.8 0.808
V
0.8 0.812
Load Regulation
IOUT = 3A to 9A (Continuous Mode)
0.25
%
Line Regulation
VIN = 4.5V to 19V
0.25
%
FB Bias Current
VFB = 0.8V
50
500
nA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
3. The device is not guaranteed to function outside operating range.
4. PD(MAX) = (TJ(MAX) – TA)/ θJA, where θJA depends upon the printed circuit layout. A 5 square inch 4 layer, 0.62”, FR-4 PCB with 2oz finish copper
weight per layer is used for the θJA.
5. Specification for packaged product only.
October 2012
4
M9999-102512-A