LTM8042IV#PBF Linear Technology, LTM8042IV#PBF Datasheet - Page 3

• Manufacturer Part Number: LTM8042IV#PBF
• Description: IC, LED DRVR, LGA56
• Manufacturer: Linear Technology

Specifications of LTM8042IV#PBF

• Led Driver Application: Display Backlighting, Automotive And Avionic Lighting
• No. Of Outputs: 1
• Output Current: 1A
• Input Voltage: 3V To 30V
• Dimming Control Type: PWM / Analog
• Topology: Boost (Step Up)

ELECTRICAL CHARACTERISTICS
operating temperature range, otherwise specifications are at T
SYMBOL
V
I
V
ΔI
I
f
I
f
I
V
V
I
V
V
I
V
V
I
V
V
V
V
I
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: Absolute maximum voltage at V
BKLED
continuous operation.
Note 3: The LTM8042E/LTM8042E-1 are guaranteed to meet performance
specifications from 0°C to 125°C ambient. Specifications over the full
–40°C to 125°C internal operating temperature range are assured by
design, characterization and correlation with statistical process controls.
LED
QVCC
SW
SS
SYNC
SYNC
CTL
RUN
PWM
TGEN
CC(MIN)
CLAMP
SYNC(IL)
SYNC(IH)
RUN(IH)
RUN(IL)
PWM(IH)
PWM(IL)
TG(OH)
TG(OL)
TGEN(IH)
TGEN(IL)
OUT
/I
–
OUT
pins is 40V for non-repetitive one second transients and 30V for
PARAMETER
Minimum Input DC Voltage
LTM8042 LED Current
LTM8042-1 LED Current
Open LED Clamp Voltage
Output Current Line Regulation
V
Switching Frequency
Soft-Start Pin Current
Synchronization Frequency Range
SYNC Pull-Down Current (Into the Pin)
SYNC Input Low
SYNC Input High
CTL Input Bias Current
RUN Input Voltage High
RUN Input Voltage Low
RUN Pin Bias Current
PWM Input Voltage High
PWM Input Voltage Low
PWM Pin Bias Current
TG Output High Voltage
TG Output Low Voltage
TGEN Input Voltage High
TGEN Input Voltage Low
TGEN Pin Bias Current
CC
Supply Current
CC
, RUN, PWM, TGEN, BSTIN/
CONDITIONS
CTL Open
CTL Open, R
R
Boost Mode, LED
LTM8042, 6V < BSTOUT/BKIN < 30V
LTM8042-1, 6V < BSTOUT/BKIN < 30V
PWM = 0V
RUN = 0V
RT = 90.9k
RT = 22.1k
RT = 6.04k
SS = 0.5V, Out of Pin
V
CTL = 0V, Flows Out of Pin
Relative to LED
Relative to LED
PWM = 0V
SYNC
CTL
= 6.81k
The
= 2V
A
l
= 25°C. V
CTL
denotes the specifications which apply over the full internal
+
+
, 100k from LED
, 100k from LED
= 6.81k
+
The LTM8042I/LTM8042I-1 are guaranteed to meet specifications over
the full –40°C to 125°C internal operating temperature range. Note that
the maximum internal temperature is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
Note 4: This device includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum internal operating temperature
when overtemperature protection is active. Continuous operation above
the specified maximum operating junction temperature may impair device
reliability.
Open
CC
= 5V, buck mode with 4Ω load.
+
+
to TG
to TG
LTM8042/LTM8042-1
l
MIN
0.45
0.34
0.17
0.22
0.68
0.9
1.7
0.3
1.5
1.5
1.5
1.5
3
6
0.25
TYP
100
100
0.5
0.5
0.5
4.2
0.1
0.8
36
60
60
60
–7
2
9
0
MAX
1.05
0.55
0.39
0.20
0.27
0.92
100
120
200
2.3
2.5
0.4
0.4
0.4
0.4
12
1
UNITS
80421fa
3
MHz
MHz
MHz
MHz
mA
μA
μA
μA
μA
μA
μA
μA
%
%
V
A
A
A
A
V
V
V
V
V
V
V
V
V
V
V