MIC22602YML TR Micrel Inc, MIC22602YML TR Datasheet - Page 16

• Manufacturer Part Number: MIC22602YML TR
• Description: ID BUCK SYNC ADJ 6A 24MLF
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck), PWM - Voltage Moder

Specifications of MIC22602YML TR

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adj to 0.7V
• Current - Output: 6A
• Frequency - Switching: 1MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-MLF®, QFN
• Voltage - Supply: 2.6 V ~ 5.5 V
• Frequency-max: 1.2MHz
• Duty Cycle: 100%
• Pwm Type: Voltage Mode
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3645-2; MIC22602YML TR; MIC22602YMLTR

VOUT
@6A
Micrel, Inc.
October 2009
VIN
0.7V
1.2V
1.8V
2.5V
3.3V
•
•
Table 1. Power Dissipation (W) for 6A output
Rθ
resistance (Rθ
resistance (Rθ
the solder connection from the ePAD to the PCB
is negligible; Rθ
the ground plane to ambient, so Rθ
Rθ
T
AMB
JA
CA
.
is the Operating Ambient temperature.
is a combination of junction to case thermal
2.6V
------
------
1.41
1.43
1.48
1.269
1.276
1.292
1.295
3.3V
------
JC
CA
) and Case-to-Ambient thermal
CA
), since thermal resistance of
is the thermal resistance of
1.209
1.220
1.230
1.228
1.216
3.6V
1.192
1.206
1.221
1.215
1.208
4.5V
1.198
1.207
1.218
1.224
1.201
JA
5.5V
= Rθ
1.202
1.214
1.231
1.230
1.224
JC
5.5V
+
16
Example:
The
contributing to an Rθ
worst case Rθ
To calculate the junction temperature for a 50°C
ambient:
This is below the maximum of 125°C.
Evaluation
Rθ
Rθ
T
T
T
J
J
J
= T
= 50 + (1.5 x 39)
= 109°C
JA
JA
= Rθ
= 14 + 25 = 39
AMB
JC
of the MLF 4x4 is 14
+P
JC
board
DISS
+ Rθ
JA
. Rθ
of approximately 25°C/W. The
CA
has
o
JA
C/W
two
o
C/W.
M9999-102809-A
copper
MIC22602
planes