MIC26903ZA Datasheet, PDF (4/28 Pages) Micrel Semiconductor – 28V, 9A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
MIC26903-ZA
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⁽³⁾................................................. ESD Sensitive
Operating Ratings⁽²⁾
Supply Voltage (PVIN, VIN) .............................. 4.5V to 28V
PVDD, VDD Supply Voltage ............................ 4.5V to 5.5V
Enable Input (V_EN) ................................................. 0V to VIN
Junction Temperature (T_J) ........................ −40°C to +125°C
Maximum Power Dissipation......................................Note 4
Package Thermal Resistance⁽⁴⁾
5mm x 6mm QFN (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
28
V
Quiescent Supply Current
Shutdown Supply Current
VDD Supply Voltage
VFB = 1.5V (non-switching)
VEN = 0V
730 1500
µA
5
10
µA
VDD Output Voltage
VDD UVLO Threshold
VIN = 7V to 28V, IDD = 40mA
VDD Rising
4.8
5
5.4
V
3.7
4.2
4.5
V
VDD UVLO Hysteresis
Dropout Voltage (VIN – VDD)
DC/DC Controller
IDD = 25mA
400
mV
380
600
mV
Output Voltage Adjust Range (VOUT)
Reference
−40°C ≤ TJ ≤ 85°C
0.6
5.5
V
Feedback Voltage
Load Regulation
Line Regulation
0°C ≤ TJ ≤ 85°C, ±1.0%
−40°C ≤ TJ ≤ 125°C, ±1.5%
IOUT = 0A to 9A
VIN = 4.5V to 28V
0.594 0.6 0.606
V
0.591 0.6 0.609
0.25
%
0.25
%
FB Bias Current
VFB = 0.6V
50
nA
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. PD(MAX) = (TJ(MAX) – TA)/ θJA, where θJA depends upon the printed circuit layout. A 5-in² 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.
May 29, 2013
4
Revision 1.0