LTC3601 Linear Technology, LTC3601 Datasheet - Page 4

• Manufacturer Part Number: LTC3601
• Description: 15V Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

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LTC3601
ELECTRICAL CHARACTERISTICS
Note 3: T
dissipation, P
where θ
package.
TYPICAL PERFORMANCE CHARACTERISTICS
T
4
A
= 25°C, V
T
100
100
J
90
80
70
60
50
40
30
20
10
80
95
90
85
75
70
65
60
= T
0
0.001
JA
4
Effi ciency vs Load Current
Burst Mode Operation
Effi ciency vs Input Voltage
Burst Mode Operation
J
A
V
V
FIGURE 7 CIRCUIT
= 45°C/W for the QFN package and θ
is calculated from the ambient temperature, T
OUT
OUT
+ (P
D
IN
= 1.8V
= 1.8V
, according to the following formula:
6
D
I
= 12V, f
0.01
• θ
LOAD
JA
INPUT VOLTAGE (V)
LOAD CURRENT (A)
8
= 1.5A
)
I
LOAD
O
0.1
= 1MHz, L = 2.2μH unless otherwise noted.
10
= 100mA
I
LOAD
I
LOAD
12
= 10mA
= 500mA
1
V
V
V
IN
IN
IN
14
= 4V
= 8V
= 12V
3601 G01
3601 G04
16
10
JA
= 38°C/W for the MSOP
A
100
, and power
90
80
70
60
50
40
30
20
10
92
90
88
86
84
82
80
0
0.001
0.5
Effi ciency vs Load Current
Forced Continuous Mode
Effi ciency vs Frequency
Forced Continuous Mode
V
V
I
LOAD
OUT
OUT
= 1.8V
=1.8V
= 500mA
1.0
0.01
LOAD CURRENT (A)
FREQUENCY (MHz)
1.5
0.1
Note 4: Maximum allowed current draw when used as a regulated output
is 5mA. This supply is only intended to provide additional DC load current
as needed and not intended to regulate large transient or ac behavior as
these waveforms may impact LTC3601 operation.
L = 1μH
2.0
L = 2.2μH
1
2.5
V
V
V
IN
IN
IN
= 4V
= 8V
= 12V
3601 G02
3601 G05
10
3.0
0.605
0.603
0.601
0.599
0.597
0.595
100
90
80
70
60
50
40
30
20
10
0
0.001
–50 –25
Effi ciency vs Load Current
Reference Voltage vs
Temperature
BURST
0.01
0
LOAD CURRENT (A)
TEMPERATURE (°C)
25
FORCED
CONTINUOUS
0.1
50
75
V
V
1
OUT
OUT
100
= 3.3V
= 5V
3601 G03
3601 G06
3601f
125
10