LTM4609
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
temperature range (Note 2), otherwise specifications are at T A = 25°C, V IN = 12V, per typical application (front page) configuration.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Specifications
V IN(DC)
Input DC Voltage
l
4.5
36
V
V IN(UVLO)
I Q(VIN)
Undervoltage Lockout Threshold
Input Supply Bias Current
Normal
Standby
Shutdown Supply Current
V IN Falling (–40°C to 85°C)
V IN Falling (–55°C to 125°C)
V RUN = 0V, V STBYMD > 2V
V RUN = 0V, V STBYMD = Open
l
l
3.4
3.4
2.8
1.6
35
4
4.5
60
V
V
mA
mA
μA
Output Specification s
I OUTDC
Output Continuous Current Range
(Note 3)
V IN = 32V, V OUT = 12V
V IN = 6V, V OUT = 12V
10
4
A
A
Δ V FB /V FB(NOM)
Line Regulation Accuracy
V IN = 4.5V to 36V, V COMP = 1.2V (Note 4)
0.002
0.02
%/V
Δ V FB /V FB(LOAD)
Load Regulation Accuracy
V COMP = 1.2V to 0.7V
V COMP = 1.2V to 1.8V (Note 4)
l
l
0.15
–0.15
0.5
–0.5
%
%
Switch Section (Not e 5)
M1 t r
M1 t f
M3 t r
M3 t f
M2, M4 t r
M2, M4 t f
t 1d
t 2d
t 3d
t 4d
Mode Transition 1
Mode Transition 2
M1 R DS(ON)
Turn-On Time
Turn-Off Time
Turn-On Time
Turn-Off Time
Turn-On Time
Turn-Off Time
M1 Off to M2 On Delay
M2 Off to M1 On Delay
M3 Off to M4 On Delay
M4 Off to M3 On Delay
M2 Off to M4 On Delay
M4 Off to M2 On Delay
Static Drain-to-Source
On-Resistance
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Drain to Source Voltage V DS = 12V,
Bias Current I SW = 10mA
Bias Current I SW = 3A
50
40
25
20
20
20
50
50
50
50
220
220
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
M2 R DS(ON)
M3 R DS(ON)
M4 R DS(ON)
Static Drain-to-Source
On-Resistance
Static Drain-to-Source
On-Resistance
Static Drain-to-Source
On-Resistance
Bias Current I SW = 3A
Bias Current I SW = 3A
Bias Current I SW = 3A
14
14
14
20
20
20
Oscillator and Phase-Locked Loop
f NOM
f LOW
Nominal Frequency
Lowest Frequency
V PLLFLTR = 1.2V
V PLLFLTR = 0V
260
170
300
200
330
220
kHz
kHz
4609ff
For more information www.linear.com/LTM4609
3
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