Datasheet

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LT3060 Series

3060fb

Typical applicaTion

DescripTion

45V V

, Micropower,

Low Noise, 100mA Low

Dropout, Linear Regulator

The LT

3060 series are micropower, low dropout voltage

(LDO) linear regulators that operate over a 1.6V to 45V

input supply range. The devices supply 100mA of output

current with a typical dropout voltage of 300mV. A single

external capacitor provides programmable low noise

reference performance and output soft-start functional-

ity. The LT3060’s quiescent current is merely 40μA and

provides fast transient response with a minimum 2.2μF

output capacitor. In shutdown, quiescent current is less

than 1μA and the reference soft-start capacitor is reset.

The LT3060 regulators optimize stability and transient

response with low ESR, ceramic output capacitors.

The regulators do not require the addition of ESR as is

common with other regulators.

Internal protection circuitry includes reverse-battery

protection, reverse-output protection, reverse-current

protection, current limit with foldback and thermal

shutdown. The LT3060 series are available in fixed output

voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V, and as an

adjustable voltage regulator with an output voltage range

from the 600mV reference to 44.5V. The LT3060 regulators

are offered in the thermally enhanced 8-lead TSOT-23 and

8-lead (2mm × 2mm × 0.75mm) DFN packages.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

2.5V Low Noise Regulator

FeaTures

applicaTions

Input Voltage Range: 1.6V to 45V

Output Current: 100mA

Quiescent Current: 40µA

Dropout Voltage: 300mV

Low Noise: 30µV

RMS

(10Hz to 100kHz)

Adjustable Output: V

REF

= 600mV

Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V

Output Tolerance: ±2% Over Line, Load and

Temperature

Single Capacitor Soft-Starts Reference and Lowers

Output Noise

Shutdown Current: < 1µA

Reverse Battery Protection

Current Limit Foldback Protection

Thermal Limit Protection

8-Lead 2mm × 2mm × 0.75mm DFN and

8-Lead

ThinSOT

™

Packages

Battery-Powered Systems

Automotive Power Supplies

Industrial Power Supplies

Avionic Power Supplies

Portable Instruments

3060 TA01

SHDN

OUT

ADJ

GND REF/BYP

LT3060-2.5

3V TO

45V

OUT

2.5V AT 100mA

30µV

RMS

NOISE

1µF

10µF

10nF

Dropout Voltage

OUTPUT CURRENT (mA)

DROPOUT VOLTAGE (mV)

300

250

200

150

100

350

10 60 70 80 90 10020 30 40

3060 TA02

= 25°C

Summary of content (26 pages)

PAGE 1
LT3060 Series 45V VIN , Micropower, Low Noise, 100mA Low Dropout, Linear Regulator Description Features n n n n n n n n n n n n n n Input Voltage Range: 1.6V to 45V Output Current: 100mA Quiescent Current: 40µA Dropout Voltage: 300mV Low Noise: 30µVRMS (10Hz to 100kHz) Adjustable Output: VREF = 600mV Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.
PAGE 2
LT3060 Series Absolute Maximum Ratings (Note 1) IN Pin Voltage......................................................... ±50V OUT Pin Voltage...................................................... ±50V Input-to-Output Differential Voltage (Note 2).......... ±50V ADJ Pin Voltage...................................................... ±50V SHDN Pin Voltage................................................... ±50V REF/BYP Pin Voltage........................................ – 0.
PAGE 3
LT3060 Series order information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3060MPTS8#PBF LT3060MPTS8#TRPBF LTDTF 8-Lead Plastic ThinSOT –55°C to 150°C LT3060HTS8#PBF LT3060HTS8#TRPBF LTDTF 8-Lead Plastic ThinSOT –40°C to 150°C LT3060ETS8-1.2#PBF LT3060ETS8-1.2#TRPBF LTFWB 8-Lead Plastic ThinSOT –40°C to 125°C LT3060ITS8-1.2#PBF LT3060ITS8-1.2#TRPBF LTFWB 8-Lead Plastic ThinSOT –40°C to 125°C LT3060MPTS8-1.2#PBF LT3060MPTS8-1.
PAGE 4
LT3060 Series order information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3060EDC-5 LT3060EDC-5#TR LFVZ 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C LT3060IDC-5 LT3060IDC-5#TR LFVZ 8-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C LT3060ETS8 LT3060ETS8#TR LTDTF 8-Lead Plastic ThinSOT –40°C to 125°C LT3060ITS8 LT3060ITS8#TR LTDTF 8-Lead Plastic ThinSOT –40°C to 125°C LT3060MPTS8 LT3060MPTS8#TR LTDTF 8-Lead Plastic ThinSOT –55°C to 150°C LT
PAGE 5
LT3060 Series Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) PARAMETER Minimum Input Voltage (Notes 4, 12) Regulated Output Voltage (Note 5) CONDITIONS ILOAD = 100mA MIN TYP 1.6 MAX 2.1 UNITS V l LT3060-1.2: VIN = 2.1V, ILOAD = 1mA 2.1V < VIN < 45V, 1mA < ILOAD < 100mA 2.1V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-Grades) (MP-, H-Grades) l l 1.188 1.176 1.170 1.2 1.2 1.2 1.
PAGE 6
LT3060 Series Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) PARAMETER Dropout Voltage VIN = VOUT(NOMINAL) (Notes 6, 7) CONDITIONS ILOAD = 1mA ILOAD = 1mA ILOAD = 10mA ILOAD = 10mA ILOAD = 50mA (Note 14) ILOAD = 50mA (Note 14) ILOAD = 100mA (Note 14) ILOAD = 100mA (Note 14) ILOAD = 0µA GND Pin Current VIN = VOUT(NOMINAL) + 0.
PAGE 7
LT3060 Series Electrical Characteristics 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 input-to-output differential voltage is not achievable with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 50V, the OUT pin may not be pulled below 0V.
PAGE 8
LT3060 Series Typical Performance Characteristics Typical Dropout Voltage 500 500 400 TJ = 125°C 300 TJ = 25°C 200 150 100 50 0 0 500 450 350 300 TJ ≤ 25°C 250 200 150 OUTPUT VOLTAGE (V) LT3060 30 20 3060 G03 LT3060-1.5 Output Voltage 1.224 I = 1mA 1.220 L 1.530 I = 1mA 1.525 L 1.216 1.520 1.212 1.515 1.208 1.204 1.200 1.196 1.192 1.188 1.510 1.505 1.500 1.495 1.490 1.485 1.480 1.180 1.475 1.176 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 1.
PAGE 9
LT3060 Series Typical Performance Characteristics LT3060-5 Output Voltage LT3060 ADJ Pin Voltage IL = 1mA 5.08 5.04 ADJ PIN VOLTAGE (V) 5.02 5.00 4.98 4.96 4.94 0.606 0.604 0.602 0.600 0.598 0.596 0.594 0.592 0.590 4.90 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 0.588 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3060 G11 100 75 VSHDN = VIN 25 125 100 75 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 0 10 LT3060-3.
PAGE 10
LT3060 Series Typical Performance Characteristics LT3060-1.2 GND Pin Current 1.75 2.25 2.00 GND PIN CURRENT (mA) 2.00 RL = 12Ω IL = 100mA* 1.50 1.25 1.00 RL = 24Ω IL = 50mA* 0.75 RL = 1.2k IL = 1mA* 0.50 0.25 0 0 1 2 1.75 8 9 1.25 1.00 0.25 0 10 1.75 1.25 1.00 RL = 50Ω IL = 50mA* 0.75 0.50 RL = 2.5k IL = 1mA* 0.25 0 0 1 2 1 2 2.50 8 8 2.00 1.75 1.50 9 RL = 3.3k IL = 1mA* 0.
PAGE 11
LT3060 Series Typical Performance Characteristics 2.0 2.0 1.8 1.8 SHDN PIN INPUT CURRENT (µA) SHDN PIN INPUT CURRENT (µA) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 5 ADJ Pin Bias Current 250 40 225 30 200 CURRENT LIMIT (mA) 50 20 10 0 –10 –20 10 15 20 25 30 35 SHDN PIN VOLTAGE (V) 40 1.6 1.4 1.2 1.0 0.8 0.6 0.
PAGE 12
LT3060 Series Typical Performance Characteristics LT3060-5 Input Ripple Rejection 100 100 VOUT = 0.6V VOUT = 5V 60 COUT = 10µF 50 40 30 I = 100mA 20 L CREF/BYP = CFF = 0 10 VIN = VOUT(NOMINAL) + 1.5V + COUT = 2.2µF 50mVRMS RIPPLE 0 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Minimum Input Voltage 2.0 40 30 IL = 100mA VOUT = 5V CREF/BYP = CFF = 0 10 COUT = 10µF VIN = 6V + 50mVRMS RIPPLE 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) LOAD REGULATION (mV) IL = 100mA 1.6 IL = 50mA 1.0 0.8 0.6 0.
PAGE 13
LT3060 Series Typical Performance Characteristics 80 CREF/BYP = 0 CREF/BYP = 10pF 70 60 CREF/BYP = 100pF 50 40 30 CREF/BYP = 1nF 20 CREF/BYP = 10nF 10 0 0.01 CREF/BYP = 100nF 0.1 1 10 LOAD CURRENT (mA) 100 3060 G44 170 160 f = 10Hz TO 100kHz VOUT = 5V 150 COUT = 10µF 140 VOUT = 2.5V 130 VOUT = 3.3V 120 VOUT = 1.8V 110 100 VOUT = 1.5V 90 80 70 60 50 40 VOUT = 1.2V 30 20 VOUT = 0.6V 10 0 1 10 100 0.01 0.
PAGE 14
LT3060 Series Typical Performance Characteristics LT3060-5 Transient Response Load Dump VOUT 2V/DIV RL = 50Ω VOUT 2V/DIV RL = 50Ω REF/BYP 500mV/DIV REF/BYP 500mV/DIV SHDN 1V/DIV SHDN 1V/DIV VIN 10V/DIV 3060 G51 COUT = CIN = 2.2µF CREF/BYP = CFF = 10nF IFB-DIVIDER = 5µA COUT = CIN = 2.2µF CFF = 0 3060 G52 4ms/DIV COUT = CIN = 2.2µF CFF = 0 Start-Up Time vs REF/BYP Capacitor 100 CFF = 0 10 START-UP TIME (ms) START-UP TIME (ms) 100 1 0.1 0.
PAGE 15
LT3060 Series Pin Functions (DC8/TS8) REF/BYP (Pin 1/Pin 8): Reference/Bypass. Connecting a single capacitor from this pin to GND bypasses the LT3060’s reference noise and soft-starts the reference. A 10nF bypass capacitor typically reduces output voltage noise to 30µVRMS in a 10Hz to 100kHz bandwidth. Softstart time is directly proportional to the REF/BYP capacitor value. If the LT3060 is placed in shutdown, REF/BYP is actively pulled low by an internal device to reset soft-start.
PAGE 16
LT3060 Series Applications Information The LT3060 series are micropower, low noise, low dropout voltage, 100mA linear regulators with shutdown. The devices supply up to 100mA at a typical dropout voltage of 300mV and operate over a 1.6V to 45V input range. A single external capacitor provides programmable low noise reference performance and output soft-start functionality. For example, connecting a 10nF capacitor from the REF/BYP pin to GND lowers output noise to 30µVRMS over a 10Hz to 100kHz bandwidth.
PAGE 17
LT3060 Series Applications Information Table 1. Output Voltage Resistor Divider Values VOUT (V) R1 (k Ω) R2 (k Ω) 1.2 118 118 1.5 121 182 1.8 124 249 2.5 115 365 3 124 499 3.3 124 562 5 115 845 Bypass Capacitance, Output Voltage Noise and Transient Response The LT3060 regulators provide low output voltage noise over the 10Hz to 100kHz bandwidth while operating at full load with the addition of a reference bypass capacitor (CREF/BYP) from the REF/BYP pin to GND.
PAGE 18
LT3060 Series Applications Information During start-up, the internal reference soft-starts if a reference bypass capacitor is present. Regulator startup time is directly proportional to the size of the bypass capacitor, slowing to 6ms with a 10nF bypass capacitor (See Start-up Time vs REF/BYP Capacitor in the Typical Performance Characteristics section). The reference bypass capacitor is actively pulled low during shutdown to reset the internal reference.
PAGE 19
LT3060 Series Applications Information capacitors, but can still be significant enough to drop capacitor values below appropriate levels. Capacitor DC bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be verified. Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response.
PAGE 20
LT3060 Series Applications Information the package on the topside (component side) of a PCB. Connect this metal to GND on the PCB. The multiple IN and OUT pins of the LT3060 also assist in spreading heat to the PCB. 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.
PAGE 21
LT3060 Series Applications Information The LT3060 IN pin withstands reverse voltages up to 50V. The device limits current flow to less than 300µA (typically less than 50µA) and no negative voltage appears at OUT. The device protects both itself and the load against batteries that are plugged in backwards. The SHDN pin cannot be driven below GND unless tied to the IN pin. If the SHDN pin is driven below GND while IN is powered, the output may turn on.
PAGE 22
LT3060 Series Typical Application Paralleling of Regulators for Higher Output Current R1 0.15Ω VIN > 2.9V + IN OUT LT3060 C1 2.2µF ADJ SHDN GND REF/BYP C3 1nF R2 0.15Ω IN OUT R6 1.74k 1% ADJ SHDN R7 604Ω 1% GND REF/BYP C4 1nF R3 200Ω R4 200Ω 3 2 + – R5 1k 7 LT1637 C2 4.7µF R9 604Ω 1% LT3060 SHDN 2.5V 200mA R8 1.
PAGE 23
LT3060 Series Package Description DC Package 8-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1719 Rev A) 0.70 ±0.05 2.55 ±0.05 1.15 ±0.05 0.64 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ± 0.05 0.45 BSC 1.37 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.05 TYP 2.00 ±0.10 (4 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6) R = 0.115 TYP 5 8 0.40 ± 0.10 0.64 ± 0.10 (2 SIDES) PIN 1 NOTCH R = 0.20 OR 0.
PAGE 24
LT3060 Series Package Description TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637 Rev A) 0.40 MAX 2.90 BSC (NOTE 4) 0.65 REF 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.22 – 0.36 8 PLCS (NOTE 3) 0.65 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 1.95 BSC TS8 TSOT-23 0710 REV A NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3.
PAGE 25
LT3060 Series Revision History REV DATE DESCRIPTION PAGE NUMBER A 07/10 Added fixed voltage options for 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V B 05/11 Extended MP-Grade to 150°C Updated test conditions for ADJ Pin Bias Current and Reverse Output Current in Applications Information section 1-26 2-7 19-20 3060fb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use.
PAGE 26
LT3060 Series Typical Application 12V Low Noise Regulator IN VIN 13V TO 45V 1µF OUT 2.37M 1% LT3060 SHDN ADJ GND REF/BYP CFF 10nF 124k 1% 10nF 3060 TA04 VOUT 12V AT 100mA 30µVRMS NOISE 10µF OUTPUT VOLTAGE DEVIATION 50mV/DIV VIN = 13V CFF = 0 CFF = 10nF LOAD ∆IL = 10mA TO 100mA CURRENT 100mA/DIV 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 TIME (ms) 3060 TA04b Related Parts PART NUMBER DESCRIPTION COMMENTS LT1761 100mA, Low Noise LDO 300mV Dropout Voltage, Low Noise: 20µVRMS , VIN = 1.