MIC23250-AAYMT TR Micrel Inc, MIC23250-AAYMT TR Datasheet - Page 5

• Manufacturer Part Number: MIC23250-AAYMT TR
• Description: High Efficiency Dual 400mA Synchronous Buck Switcher
• Manufacturer: Micrel Inc
• Series: HyperLight Load™r
• Type: Step-Down (Buck)r

Specifications of MIC23250-AAYMT TR

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: Adj to 0.72V
• Current - Output: 400mA
• Frequency - Switching: 4MHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 12-TMLF®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3315-2

Typical Characteristics
Micrel, Inc.
June 2010
700
650
600
550
5.0
4.0
3.0
4.5
3.5
1.9
1.8
1.7
1.6
1.5
50
45
40
35
30
25
20
15
10
2.7
2.7
5
0
3.2
3.2
Quiescent Current
vs. Input Voltage
INPUT VOLTAGE (V)
vs. Input Voltage
INPUT VOLTAGE (V)
vs. Temperature
TEMPERATURE (°C)
vs. Temperature
TEMPERATURE (°C)
Output Voltage
Current Limit
VOUT1 = 1.575V
VOUT2 = 1.8V
3.7
3.7
Frequency
20 40 60 80
20 40 60 80
4.2
4.2
L = 1µH
C
Load = 120mA
L = 1µH
C
Load = 120mA
L = 1µH
C
L = 1µH
C
OUT
OUT
OUT
OUT
4.7
4.7 5.2
= 4.7µF
= 4.7µF
= 4.7µF
= 4.7µF
5.2 5.7
5.7
4MHz
0.01
1.88
1.86
1.84
1.82
1.78
1.76
1.74
1.72
1.90
1.80
1.70
100
1.0
0.1
1.2
0.8
0.6
0.4
0.2
10
90
80
70
60
50
40
30
20
10
1
0
0
11
11
11
VIN = 2.7V
VIN = 4.2V
VIN = 2.7V
Efficiency V
VIN = 3.6V
Switching Frequency
V
vs. Output Current
IN
vs. Output Current
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
VIN = 4.2V
V
Enable Threshold
vs. Temperature
TEMPERATURE (°C)
IN
= 3.6V
Output Voltage
VIN = 3.0V
= 3.0V
0
0
0
20 40 60 80
VIN = 3.6V
VIN = 3.0V
V
IN
5
OUT
= 4.2V
L = 1µH
C
VIN = 3.6V
V
L = 1µH
C
L = 1µH
C
OUT
100
100
OUT
100
OUT
OUT
VIN = 5.5V
= 1.2V
= 4.7µF
= 1.8V
= 4.7µF
= 4.7µF
1000
1000
1000
0.975
0.950
0.925
0.875
0.850
0.825
1.000
0.900
0.800
4MHz
0.01
1.88
1.86
1.84
1.82
1.78
1.76
1.74
1.72
1.90
1.80
1.70
100
0.1
10
90
80
70
60
50
40
30
20
10
2.7
2.7
1
0
11
11
Load = 50mA
VIN = 4.2V
Efficiency V
VIN = 2.7V
L = 4.7µH
L = 1µH
C
OUT
OUTPUT CURRENT (mA)
Switching Frequency
3.2
3.2
Load = 10mA
vs. Output Current
OUTPUT CURRENT (mA)
vs. Input Voltage
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
INPUT VOLTAGE (V)
Enable ON
Output Voltage
= 4.7µF
Load = 400mA
3.7
3.7
0
0
VIN = 3.0V
L = 2.2µH
4.2
4.2
OUT
Load = 300mA
M9999-061110-E
Enable OFF
VIN = 3.6V
V
V
Load = 150mA
V
V
C
L = 1µH
C
Load = 1mA
L = 1µH
IN
OUT
100
100
IN
OUT
OUT
OUT
Load = 150mA
4.7 5.2 5.7
4.7
= 1.575V
= 3.6V
= 3.6V
= 1.8V
MIC23250
= 1.8V
= 4.7µF
= 4.7µF
5.2 5.7
1000
1000