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LTM4619
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range (Note 2), otherwise specifications are at T A = 25°C, V IN = 12V. Per typical application in Figure 18.
Specified as each channel. (Note 3)
SYMBOL
f NOM
f LOW
f HIGH
PARAMETER
Nominal Frequency
Lowest Frequency
Highest Frequency
CONDITIONS
V FREQ = 1.2V
V FREQ = 0V
V FREQ ≥ 2.4V
MIN
450
210
700
TYP
500
250
780
MAX
550
290
860
UNITS
kHz
kHz
kHz
R MODE/PLLIN
MODE/PLLIN Input Resistance
250
kΩ
I FREQ
Frequency Setting
Sinking Current
Sourcing Current
f MODE > f OSC
f MODE < f OSC
–13
13
μA
μA
V RUN1, 2
RUN Pin ON/OFF Threshold
RUN Rising
RUN Falling
1.1
1.02
1.22
1.14
1.35
1.27
V
V
R FB1 , R FB2
V PGL
I PGOOD
Resistor Between V OUT and V FB
Pins for Each Channel
PGOOD Voltage Low
PGOOD Leakage Current
I PGOOD = 2mA
V PGOOD = 5V
60.1
60.4
0.1
60.7
0.3
±2
k?
V
μA
Δ V PGOOD
PGOOD Range
V FB Ramping Negative
V FB Ramping Positive
–5
5
–7.5
7.5
–10
10
%
%
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM4619E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the full –40°C to 125°C internal operating temperature range are
assured by design, characterization and correlation with statistical process
controls. The LTM4619I is guaranteed to meet specifications over the full
internal operating temperature range. Note that the maximum ambient
temperature consistent with these specifications is determined by specific
operating conditions in conjunction with board layout, the rated package
thermal resistance and other environmental factors.
Note 3: The two outputs are tested separately and the same testing
condition is applied to each output.
Note 4: 100% tested at wafer level only.
Note 5: See Output Current Derating curves for different V IN , V OUT and T A .
TYPICAL PERFORMANCE CHARACTERISTICS
(Refer to Figures 18 and 19)
1.5V OUT
95
90
85
80
75
Efficiency vs Load Current with
5V IN (f = 500kHz for 0.8V OUT ,
1.2V OUT and 1.5V OUT )
2.5V OUT
3.3V OUT
1.2V OUT
1.5V OUT
0.8V OUT
95
90
85
80
75
Efficiency vs Load Current with
12V IN (f = 500kHz for 1.2V OUT and
1.5V OUT )
3.3V OUT 5V OUT
2.5V OUT
1.2V OUT
95
90
85
80
75
70
Efficiency vs Load Current with
24V IN (f = 500kHz for 1.5V OUT )
5V OUT
3.3V OUT
1.5V OUT
2.5V OUT
70
65
60
70
65
60
65
60
55
50
55
0
0.5
1
1.5
2
2.5
3
3.5
4
55
0
0.5
1
1.5
2
2.5
3
3.5
4
45
0
0.5
1
1.5
2
2.5
3
3.5
4
LOAD CURRENT (A)
4619 G01
LOAD CURRENT (A)
4619 G02
LOAD CURRENT (A)
4619 G03
4619fb
4
For more information www.linear.com/LTM4619
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