LTC3406B-2 Linear Technology, LTC3406B-2 Datasheet - Page 3

• Manufacturer Part Number: LTC3406B-2
• Description: (LTC3406B-1/-2) 600mA Synchronous Step-Down Regulator in ThinSOT
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3406BE-1.2 is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: T
dissipation P
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure 1)
4
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
LTC3406B-1.2: T
95
90
85
80
75
70
65
60
55
50
–50
2
Efficiency vs Input Voltage
Oscillator Frequency vs
Temperature
V
J
IN
is calculated from the ambient temperature T
–25
= 3.6V
D
according to the following formula:
3
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
J
= T
25
A
4
+ (P
50
I
I
OUT
OUT
D
I
)(250°C/W)
OUT
= 10mA
= 100mA
75
= 600mA
W
5
100
3406B12 G01
3406B12 G04
U
125
6
A
100
and power
1.8
1.7
1.6
1.5
1.4
1.3
1.2
90
80
70
60
50
40
30
20
10
0.1
Efficiency vs Output Current
Oscillator Frequency vs
Supply Voltage
2
T
V
T
A
OUT
A
= 25°C
= 25°C
= 1.2V
OUTPUT CURRENT (mA)
1
3
SUPPLY VOLTAGE (V)
V IN = 4.2V
V IN = 2.7V
V IN = 3.6V
10
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
4
100
5
3406B12 GO2
3406B12 G05
1000
6
1.228
1.218
1.208
1.198
1.188
1.178
1.168
1.224
1.214
1.204
1.194
1.184
1.174
–50
0
Reference Voltage vs
Temperature
Output Voltage vs Load Current
V
IN
100
–25
= 3.6V
200 300 400
LTC3406B-1.2
LOAD CURRENT (mA)
0
TEMPERATURE (°C)
25
500
50
600
sn3406b12 3406b12fs
700
75
800
100
3406B12 G06
3406B12 G03
900
3
125
1000