LT3050EDDB#PBF Linear Technology, LT3050EDDB#PBF Datasheet

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LT3050EDDB#PBF

Manufacturer Part Number
LT3050EDDB#PBF
Description
IC ADJ LDO REG 0.6V TO 44.5V 0.1A DFN-12
Manufacturer
Linear Technology
Datasheet

Specifications of LT3050EDDB#PBF

Primary Input Voltage
45V
Output Voltage Adjustable Range
0.6V To 44.5V
Dropout Voltage Vdo
340mV
No. Of Pins
12
Output Current
100mA
Operating Temperature Range
-40°C To +125°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number:
LT3050EDDB#PBFLT3050EDDB-3.3
Manufacturer:
LT
Quantity:
10 000
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APPLICATIONS
n
n
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FEATURES
TYPICAL APPLICATION
12V
V
IN
Output Current Monitor: 1/100
Fault Indicator: Current Limit, Minimum I
Thermal Limit
Output Current: 100mA
Dropout Voltage: 340mV
Input Voltage Range: 1.6V to 45V
Programmable Precision Current Limit: ±5%
Programmable Minimum I
Low Noise: 30μV
Adjustable Output (V
Fixed Output Voltages: 3.3V, 5V
Output Tolerance: ±2% Over Line, Load and Temperature
Stable with Low ESR, Ceramic Output Capacitors
(2.2μF minimum)
Shutdown Current: <1μA
Reverse-Battery, Reverse-Output and
Reverse-Current Protection
Thermal Limit Protection
12-Lead 3mm × 2mm DFN and MSOP Packages
Protected Antenna Supplies
Automotive Telematics
Industrial Applications (Trucks, Forklifts, etc.)
High Reliability Applications
10nF
0.1μF
5V Supply with 100mA Precision Current Limit, 10mA I
1.15k
(THRESHOLD = 100mA)
11.3k
(THRESHOLD = 10mA)
1μF
120k
RMS
REF
(10Hz to 100kHz)
= V
IN
SHDN
FAULT
I
I
MAX
MIN
OUT
OUT(MIN)
LT3050-5
GND
th
Monitor
REF/BYP
of I
I
OUT
MON
OUT
= 0.6V)
3k
(ADC FULL SCALE = 3V)
10nF
OUT
or
2.2μF
3050 TA01
MIN
with Precision Current Limit
DESCRIPTION
The LT
dropout voltage (LDO) linear regulators. The devices
supply 100mA of output current with a dropout voltage of
340mV. A 10nF bypass capacitor reduces output noise to
30μV
the reference. The LT3050’s ±45V input voltage rating
combined with its precision current limit and diagnostic
functions make the IC an ideal choice for robust, high
reliability applications.
A single resistor programs the LT3050’s current limit, accurate
to ±5% over a wide input voltage and temperature range.
A single resistor programs the LT3050’s minimum output
current monitor, useful for detecting open-circuit conditions.
The current monitor function sources a current equal to
1/100th of output current. A logic FAULT pin asserts low if
the LT3050 is in current limit, operating below its minimum
output current (open-circuit) or is in thermal shutdown.
The LT3050 optimizes stability and transient response
with low ESR ceramic capacitors, requiring a minimum of
2.2μF. The LT3050 is available in fi xed output voltages of
3.3V and 5V, and as an adjustable version with an output
voltage range down to the 0.6V reference.The LT3050 is
available in the thermally-enhanced 12-Lead 3mm × 2mm
DFN and MSOP packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
0.1μF
TO μP ADC
5V
100mA, Linear Regulator
RMS
and Diagnostic Outputs
®
3050 series are micro-power, low noise, low
in a 10Hz to 100kHz bandwidth and soft-starts
105
104
103
102
101
100
External Current Limit R
99
98
97
96
95
–75 –50 –25 0 –25 50 75 100 125 150 175
V
OUT
LT3050 Series
= 5V
TEMPERATURE (°C)
V
V
V
IN
IN
IN
IMAX
= 15V
= 12V
= 5.6V
= 1.15k
3050 TA01a
3050fa
1

Related parts for LT3050EDDB#PBF

LT3050EDDB#PBF Summary of contents

Page 1

... LT3050 is available in the thermally-enhanced 12-Lead 3mm × 2mm DFN and MSOP packages. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. MIN ...

Page 2

... LT3050MPMSE#PBF LT3050MPMSE#TRPBF LT3050EMSE-3.3#PBF LT3050EMSE-3.3#TRPBF LT3050IMSE-3.3#PBF LT3050IMSE-3.3#TRPBF LT3050MPMSE-3.3#PBF LT3050MPMSE-3.3#TRPBF 305033 LT3050EMSE-5#PBF LT3050EMSE-5#TRPBF LT3050IMSE-5#PBF LT3050IMSE-5#TRPBF LT3050MPMSE-5#PBF LT3050MPMSE-5#TRPBF LT3050EDDB#PBF LT3050EDDB#TRPBF LT3050IDDB#PBF LT3050IDDB#TRPBF LT3050EDDB-3.3#PBF LT3050EDDB-3.3#TRPBF LT3050IDDB-3.3#PBF LT3050IDDB-3.3#TRPBF 2 (Note 1) FAULT Pin Voltage ..........................................–0.3V, 50V Output Short-Circuit Duration .......................... Indefi nite Operating Junction Temperature Range (Notes Grades .........................................– ...

Page 3

ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT3050EDDB-5#PBF LT3050EDDB-5#TRPBF LT3050IDDB-5#PBF LT3050IDDB-5#TRPBF LEAD BASED FINISH TAPE AND REEL LT3050EMSE LT3050EMSE#TR LT3050IMSE LT3050IMSE#TR LT3050MPMSE LT3050MPMSE#TR LT3050EMSE-3.3 LT3050EMSE-3.3#TR LT3050IMSE-3.3 LT3050IMSE-3.3#TR LT3050MPMSE-3.3 LT3050MPMSE-3.3#TR LT3050EMSE-5 LT3050EMSE-5#TR LT3050IMSE-5 LT3050IMSE-5#TR LT3050MPMSE-5 LT3050MPMSE-5#TR LT3050EDDB LT3050EDDB#TR LT3050IDDB LT3050IDDB#TR ...

Page 4

LT3050 Series ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER Dropout Voltage (Notes OUT(NOMINAL) GND Pin Current 0.6V (Notes 6, 7, 11) IN OUT(NOMINAL) Quiescent Current in ...

Page 5

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER Minimum I Threshold Accuracy MIN (Notes Threshold Accuracy (Notes 6, 9) MIN Current Monitor Ratio (Notes 6, 10) Ratio = I /I OUT MON Note 1: ...

Page 6

LT3050 Series TYPICAL PERFORMANCE CHARACTERISTICS Typical Dropout Voltage 600 550 500 450 T ≤ 125°C J 400 350 300 250 T ≤ 25°C J 200 150 100 100 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS GND Pin Current LT3050-5 2.50 2.25 2. 50Ω 100mA L L 1.75 1.50 1. 100Ω 50mA L L 1. 1mA L L 0.50 ...

Page 8

LT3050 Series TYPICAL PERFORMANCE CHARACTERISTICS Reverse Output Current 1.0 ALL PINS GROUNDED EXCEPT FOR OUT 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 (V) OUT 3050 G16 Input Ripple Rejection 90 C ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS Output Noise Spectral Density REF/BYP OUT V = 3.3V 0.1 OUT V = 2.5V OUT V = 1.8V OUT V = 1.5V OUT C = ...

Page 10

LT3050 Series TYPICAL PERFORMANCE CHARACTERISTICS 5V Transient Response 10mA to 100mA FF OUT OUT 50mV/DIV I OUT 50mA/DIV 100μs/DIV 3050 G28a 10μF OUT IN ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS External Current Limit R = 1.5k IMAX 79. OUT 78.75 78. 15V IN 77.25 76. 12V IN 75.75 75. 5.6V IN 74.25 73.50 72.75 72.00 –75 –50 –25 ...

Page 12

LT3050 Series TYPICAL PERFORMANCE CHARACTERISTICS I /I Current Ratio OUT MON V = 3.3V 12V OUT IN 103 102 V = 3.3V IMON 101 100 IMON 96 95 125°C 25°C 94 –55°C ...

Page 13

PIN FUNCTIONS REF/BYP (Pin 1): Bypass/Soft-Start. Connecting a single capacitor from this pin to GND bypasses the LT3050’s reference noise and soft-starts the reference. A 10nF by- pass capacitor typically reduces output voltage noise to 30μ 10Hz to ...

Page 14

LT3050 Series PIN FUNCTIONS For detailed information on how to set the I value, please see the Operation section. The I pin requires a 10nF decoupling capacitor to MAX ground. If not used, tie I to GND. MAX I (Pin ...

Page 15

OPERATION I Pin Operation (Current Monitor) MON The I pin is the collector of a PNP which mirrors the MON LT3050 output PNP at a ratio of 1:100 (see block diagram on page 11). The current sourced by the I ...

Page 16

LT3050 Series OPERATION External Programmable Current Limit (I The I pin is the collector of a PNP which mirrors the MAX LT3050 output at a ratio of approximately 1:200 (see Block Diagram). The I pin is also the input to ...

Page 17

APPLICATIONS INFORMATION The LT3050 is a micropower, low noise and low dropout voltage, 100mA linear regulator with micropower shutdown, programmable current limit, and diagnostic functions. The device supplies up to 100mA at a typical dropout voltage of 340mV and operates ...

Page 18

LT3050 Series APPLICATIONS INFORMATION Table 1 shows 1% resistor divider values for some common output voltages with a resistor divider current of 5μA. Table 1. Output Voltage Resistor Divider Valves V (V) R1 (kΩ) OUT 1.2 118 1.5 121 1.8 ...

Page 19

APPLICATIONS INFORMATION Start-up time is also affected by the presence of a feed- forward capacitor. Start-up time is directly proportional to the size of the feedforward capacitor and the output volt- age, and is inversely proportional to the feedback resistor ...

Page 20

LT3050 Series APPLICATIONS INFORMATION V OUT 1mV/DIV 10ms/DIV Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor Voltage and temperature coeffi cients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device ...

Page 21

APPLICATIONS INFORMATION For surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. Copper board stiffeners and plated through-holes also can spread the heat generated by power devices. The ...

Page 22

LT3050 Series APPLICATIONS INFORMATION The LT3050 IN pin withstands reverse voltages of 50V. The device limits current fl less than 300μA (typically less than 10μA) and no negative voltage appears at OUT. The device protects both itself and ...

Page 23

PACKAGE DESCRIPTION 0.64 ±0.05 (2 SIDES) 0.70 ±0.05 2.55 ±0.05 1.15 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.45 BSC 2.39 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED DDB Package ...

Page 24

LT3050 Series PACKAGE DESCRIPTION 2.845 0.102 (.112 .004) 5.23 1.651 0.102 (.206) (.065 .004) MIN 0.42 0.038 0.65 (.0256) (.0165 .0015) TYP BSC RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0.254 (.010) 0 – 6 TYP GAUGE PLANE (.021 .006) DETAIL ...

Page 25

... Updated data sheet to include fi xed voltage options. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 26

... ISD < OUT 1.8V to 45V, DFN Package RMS 1.2V to 36V, V RMS IN set; Directly Parallelable (no op amp OUT , V : 1.2V to 36V, V RMS IN set; Directly Parallelable (no op amp OUT LT 0610 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2009 , RMS , RMS : 0V OUT : 0V OUT 3050fa ...

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