Datasheet

ManualsBrandsLinear Technology ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 1.2V 20mA SC-70

LT3009 Series

3009fc

TEMPERATURE (°C)

DROPOUT VOLTAGE (mV)

QUIESCENT CURRENT (μA)

400

3009 TA01b

200

100

500

300

250

150

4.0

350 3.5

2.0

1.0

0.5

5.0

450 4.5

3.0

2.5

1.5

–50 –25 0 25 50 75 100 125 150

LOAD

= 20mA

DROPOUT

VOLTAGE

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

A I

, 20mA

Low Dropout Linear Regulators

The LT

3009 Series are micropower, low dropout voltage

(LDO) linear regulators. The devices supply 20mA output

current with a dropout voltage of 280mV. No-load quiescent

current is 3μA. Ground pin current remains at less than

5% of output current as load increases. In shutdown,

quiescent current is less than 1μA.

The LT3009 regulators optimize stability and transient

response with low ESR ceramic capacitors, requiring a

minimum of only 1μF. The regulators do not require the

addition of ESR as is common with other regulators.

Internal protection circuitry includes current limiting,

thermal limiting, reverse-battery protection and reverse-

current protection.

The LT3009 Series are ideal for applications that require

moderate output drive capability coupled with ultralow

standby power consumption. The device is available in

ﬁ xed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V,

and as an adjustable device with an output voltage range

down to the 600mV reference. The LT3009 is available in

the 6-lead DFN and 8-lead SC70 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.

3.3V, 20mA Supply with Shutdown

Ultralow Quiescent Current: 3μA

Input Voltage Range: 1.6V to 20V

Output Current: 20mA

Dropout Voltage: 280mV

Adjustable Output (V

ADJ

= V

OUT(MIN)

= 600mV)

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

3.3V, 5V

Output Tolerance: ±2% Over Load, Line and Temperature

Stable with Low ESR, Ceramic Output Capacitors

(1μF minimum)

Shutdown Current: <1μA

Current Limit Protection

Reverse-Battery Protection

Thermal Limit Protection

8-Lead SC70 and 2mm × 2mm DFN Packages

Low Current Battery-Powered Systems

Keep-Alive Power Supplies

Remote Monitoring

Utility Meters

Hotel Door Locks

SHDN

1μF

3009 TA01a

OUT

3.75V TO

20V

GND

LT3009-3.3

OUT

3.3V

20mA

1μF

Dropout Voltage/Quiescent Current

Summary of content (20 pages)

PAGE 1
LT3009 Series 3µA IQ, 20mA Low Dropout Linear Regulators FEATURES DESCRIPTION n The LT®3009 Series are micropower, low dropout voltage (LDO) linear regulators. The devices supply 20mA output current with a dropout voltage of 280mV. No-load quiescent current is 3μA. Ground pin current remains at less than 5% of output current as load increases. In shutdown, quiescent current is less than 1μA. n n n n n n n n n n n n Ultralow Quiescent Current: 3μA Input Voltage Range: 1.
PAGE 2
LT3009 Series ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage .........................................................±22V OUT Pin Voltage ......................................................±22V Input-to-Output Differential Voltage ........................±22V ADJ Pin Voltage ......................................................±22V SHDN Pin Voltage (Note 8) .....................................±22V Output Short-Circuit Duration ..........................
PAGE 3
LT3009 Series ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3009ESC8#PBF LT3009ESC8#TRPBF LCQY 8-Lead Plastic SC70 –40°C to 125°C LT3009ESC8-1.2#PBF LT3009ESC8-1.2#TRPBF LDTX 8-Lead Plastic SC70 –40°C to 125°C LT3009ESC8-1.5#PBF LT3009ESC8-1.5#TRPBF LDVC 8-Lead Plastic SC70 –40°C to 125°C LT3009ESC8-1.8#PBF LT3009ESC8-1.8#TRPBF LDKG 8-Lead Plastic SC70 –40°C to 125°C LT3009ESC8-2.5#PBF LT3009ESC8-2.
PAGE 4
LT3009 Series ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS MIN l 1.6 LT3009-1.2: VIN = 1.7V, ILOAD = 100μA 1.7V < VIN < 20V, 1μA < ILOAD < 20mA l 1.188 1.176 LT3009-1.5: VIN = 2V, ILOAD = 100μA 2V < VIN < 20V, 1μA < ILOAD < 20mA l LT3009-1.8: VIN = 2.3V, ILOAD = 100μA 2.3V < VIN < 20V, 1μA < ILOAD < 20mA TYP MAX UNITS 20 V 1.2 1.2 1.212 1.224 V V 1.
PAGE 5
LT3009 Series ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS MIN Output Voltage Noise (Note 9) COUT = 1μF, ILOAD = 20mA, BW = 10Hz to 100kHz TYP MAX 150 UNITS μVRMS l –10 0.3 10 nA VOUT = Off to On VOUT = On to Off l l 0.66 0.36 1.5 0.2 V V VSHDN = 0V, VIN = 20V VSHDN = 20V, VIN = 20V l l ±1 1.
PAGE 6
LT3009 Series TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Dropout Voltage ILOAD = 20mA TA = 125°C 350 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 400 300 TA = 25°C 250 200 150 100 50 Minimum Input Voltage 450 1.6 400 1.4 350 300 10mA 20mA 250 200 1mA 100μA 150 100 0 0 5 15 10 OUTPUT CURRENT (mA) 20 1 0.8 0.6 0.4 0 25 50 75 100 125 150 –50 –25 1.224 1.220 1.530 ILOAD = 100μA 1.525 1.515 0.598 0.596 0.594 OUTPUT VOLTAGE (V) 1.520 1.212 OUTPUT VOLTAGE (V) 1.216 0.
PAGE 7
LT3009 Series TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage LT3009-5 6 10 ILOAD = 100μA 8 ADJ PIN BIAS CURRENT (nA) 5.075 OUTPUT VOLTAGE (V) Adjustable Version Quiescent Current ADJ Pin Bias Current 5.050 5.025 5.000 4.975 4.950 4.925 5 6 QUIESCENT CURRENT (μA) 5.100 4 2 0 –2 –4 –6 4 3 2 1 –8 4.
PAGE 8
LT3009 Series TYPICAL PERFORMANCE CHARACTERISTICS GND Pin Current LT3009-1.5 GND Pin Current LT3009-1.
PAGE 9
LT3009 Series TYPICAL PERFORMANCE CHARACTERISTICS SHDN Pin Thresholds SHDN Pin Input Current 1.2 1.0 0.8 OFF TO ON 0.6 ON TO OFF 0.2 1600 450 1400 400 350 300 250 200 150 100 0 25 50 75 0 100 125 150 0 2 4 50 VIN = 20V REVERSE OUTPUT CURRENT (μA) VIN = 1.6V 40 30 20 10 50 75 100 125 150 35 30 25 OUT 20 15 10 ADJ 3009 G18 75 100 125 150 70 60 50 40 4.
PAGE 10
LT3009 Series TYPICAL PERFORMANCE CHARACTERISTICS 3.0 70 2.5 60 2.0 50 40 30 20 VIN = VOUT (NOMINAL) + 1V + 0.5VP-P RIPPLE AT f = 120Hz ILOAD = 20mA 10 0 –50 –25 0 25 50 75 Output Noise Spectral Density ΔIL = 1μA TO 20mA VOUT = 600mV VIN = 1.6V 1.5 1.0 0.5 0 –0.5 100 125 150 –1.0 –50 –25 0 25 50 75 RMS Output Noise vs Load Current (10Hz to 100kHz) OUTPUT NOISE (μVRMS) 1 0.1 10 1k 10k FREQUENCY (Hz) 100k 3009 G23 IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 4.
PAGE 11
LT3009 Series PIN FUNCTIONS (SC70/DFN) SHDN (Pin 1/Pin 5): Shutdown. Pulling the SHDN pin low puts the LT3009 into a low power state and turns the output off. If unused, tie the SHDN pin to VIN . The LT3009 does not function if the SHDN pin is not connected. 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 will turn on. SHDN pin logic cannot be referenced to a negative rail. GND (Pins 2, 3, 4/Pin 6): Ground.
PAGE 12
LT3009 Series APPLICATIONS INFORMATION The LT3009 is a low dropout linear regulator with ultralow quiescent current and shutdown. Quiescent current is extremely low at 3μA and drops well below 1μA in shutdown. The device supplies up to 20mA of output current. Dropout voltage at 20mA is typically 280mV. The LT3009 incorporates several protection features, making it ideal for use in battery-powered systems. The device protects itself against both reverse-input and reverse-output voltages.
PAGE 13
LT3009 Series APPLICATIONS INFORMATION be implemented to prevent board contamination. If the board is to be subjected to humidity cycling or if board cleaning measures cannot be guaranteed, consideration should be given to using resistors an order of magnitude smaller than in Table 1 to prevent contamination from causing unwanted shifts in the output voltage. Output Capacitance and Transient Response The LT3009 is stable with a wide range of output capacitors.
PAGE 14
LT3009 Series APPLICATIONS INFORMATION Voltage and temperature coefﬁcients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor, the stress can be induced by vibrations in the system or thermal transients.
PAGE 15
LT3009 Series APPLICATIONS INFORMATION The following tables list thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on 3/32" FR-4 board with one ounce copper. Table 2: Measured Thermal Resistance for DC Package COPPER AREA Calculating Junction Temperature Example: Given an output voltage of 3.
PAGE 16
LT3009 Series APPLICATIONS INFORMATION Protection Features The LT3009 incorporates several protection features that make it ideal for use in battery-powered circuits. In addition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device also protects against reverse-input voltages, reverse-output voltages and reverse output-toinput voltages.
PAGE 17
LT3009 Series TYPICAL APPLICATIONS Keep-Alive Power Supply NO PROTECTION DIODES NEEDED! VIN 12V IN 1μF 3.3V OUT 1μF LT3009-3.3 LOAD: SYSTEM MONITOR, VOLATILE MEMORY, ETC.
PAGE 18
LT3009 Series PACKAGE DESCRIPTION DC Package 6-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1703) R = 0.115 TYP 0.56 p 0.05 (2 SIDES) 0.675 p0.05 2.50 p0.05 1.15 p0.05 0.61 p0.05 (2 SIDES) PIN 1 BAR PACKAGE TOP MARK OUTLINE (SEE NOTE 6) 0.38 p 0.05 4 2.00 p0.10 (4 SIDES) PIN 1 CHAMFER OF EXPOSED PAD 3 0.25 p 0.05 0.50 BSC 1.42 p0.05 (2 SIDES) 0.200 REF RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 6 0.75 p0.05 1 (DC6) DFN 1103 0.25 p 0.05 0.50 BSC 1.37 p0.05 (2 SIDES) 0.00 – 0.
PAGE 19
LT3009 Series PACKAGE DESCRIPTION SC8 Package 8-Lead Plastic SC70 (Reference LTC DWG # 05-08-1639 Rev Ø) 0.30 MAX 0.50 REF PIN 8 1.80 – 2.20 (NOTE 4) 1.00 REF INDEX AREA (NOTE 6) 1.80 – 2.40 1.15 – 1.35 (NOTE 4) 2.8 BSC 1.8 REF PIN 1 RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.10 – 0.40 0.50 BSC 0.15 – 0.27 8 PLCS (NOTE 3) 0.80 – 1.00 0.00 – 0.10 REF 1.00 MAX GAUGE PLANE 0.15 BSC 0.26 – 0.46 0.10 – 0.18 (NOTE 3) SC8 SC70 0905 REV Ø NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2.
PAGE 20
LT3009 Series RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1761 100mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 20μA, ISD < 1μA, Low Noise < 20μVRMS , Stable with 1μF Ceramic Capacitors, ThinSOTTM Package LT1762 150mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 25μA, ISD < 1μA, Low Noise < 20μVRMS , MS8 Package LT1763 500mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.