OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC3035EDDB#TRPBF

P1-P3P4-P6P7-P9P10-P12
LTC3035
1
3035f
■
Wide Input Voltage Range: 1.7V to 5.5V
■
Wide Adjustable Output Voltage Range:
0.4V to 3.6V
■
Built-In Charge Pump Generates High Side Bias
■
Very Low Dropout: 45mV at 300mA
■
±
2% Voltage Accuracy Over Temperature,
Supply, Load
■
Fast Transient Recovery
■
Low Operating Current: I
IN
= 100µA Typ
■
Low Shutdown Current: I
IN
= 1µA Typ
■
Stable with Ceramic Capacitor Down to 1µF
■
Output Current Limit
■
Thermal Overload Protected
■
Reverse Output Current Protected
■
Available in 8-Lead (3mm × 2mm) DFN Package
TYPICAL APPLICATIO
U
FEATURES
DESCRIPTIO
U
The LTC
®
3035 is a micropower, VLDO™ (very low drop-
out) linear regulator which operates from input voltages as
low as 1.7V. The device is capable of supplying 300mA of
output current with a typical dropout voltage of only
45mV. To allow operation at low input voltages the LTC3035
includes a charge pump generator that provides the nec-
essary bias voltage for the internal LDO circuitry. Output
current comes directly from the input supply for high
efficiency regulation. The charge pump bias generator
requires only a 0.1µF flying capacitor and a 1µF bypass
capacitor for operation. The low 0.4V internal reference
voltage allows the LTC3035 to be programmed to much
lower output voltages than commonly available in LDOs.
The output voltage is programmed via two tiny SMD
resistors. The LTC3035’s low quiescent current makes it
an ideal choice for use in battery-powered systems.
Other features include high output voltage accuracy, ex-
cellent transient response, stability with ultralow ESR
ceramic capacitors as small as 1µF, short-circuit and
thermal overload protection, output current limiting and
reverse output current protection. The LTC3035 is avail-
able in a tiny, low profile (3mm × 2mm × 0.75mm) 8-lead
DFN package.
300mA VLDO Linear
Regulator with Charge Pump
Bias Generator
APPLICATIO S
U
■
Li-Ion to 3.3V Low Dropout Supplies
■
2 × AA to 1.8V Low Dropout Supplies
■
Low Power Handheld Devices
■
Low Voltage Logic Supplies
■
DSP Power Supplies
■
Cellular Phones
■
Portable Electronic Equipment
■
Handheld Medical Instruments
■
Post Regulator for Switching Supply Noise Rejection
3.3V Output Voltage from Li-Ion Battery
, LTC and LT are registered trademarks of Linear Technology Corporation.
VLDO is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6411531, others pending.
I
OUT
(mA)
0
70
60
50
40
30
20
10
0
150 250
3035 TA01b
50 100
200 300
DROPOUT VOLTAGE (mV)
T
A
= 25°C
Dropout Voltage vs Load Current
CP
0.4V
IN
SHDN
GND
Li-Ion
BATTERY
3.4V TO 4.2V
1µF
0.1µF
C
BIAS
1µF
C
OUT
1µF
3035 TA01a
294k
40.2k
V
OUT
3.3V
300mA
OFF ON
CM
BIAS
OUT
ADJ
BIAS
GENERATOR
LTC3035
+
–
LTC3035
2
3035f
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Notes 1, 2)
V
IN
to GND.................................................. –0.3V to 6V
SHDN to GND ............................................. –0.3V to 6V
CP, CM, BIAS to GND ................................. –0.3V to 6V
ADJ to GND ................................................ – 0.3V to 6V
V
OUT
to GND ............................................... –0.3V to 6V
Operating Junction Temperature
(Note 3) ........................................... –40°C to 125°C
Storage Temperature Range ................ – 65°C to 125°C
Output Short Circuit Duration .......................... Indefinite
ORDER PART NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3035EDDB
TOP VIEW
9
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
5
6
7
8
4
3
2
1CP
CM
GND
IN
BIAS
SHDN
ADJ
OUT
T
JMAX
= 125°C, θ
JA
= 76°C/W
EXPOSED PAD (PIN 9) IS GND,MUST BE SOLDERED TO PCB
DDB PART MARKING
LBRM
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full specified temperature
range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 3.6V, V
OUT
= 3.3V, C
FLY
= 0.1
µ
F, C
OUT
= 1
µ
F, C
IN
= 1
µ
F, C
BIAS
= 1
µ
F (all
capacitors ceramic) unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage (Note 4) ● 1.7 5.5 V
V
BIAS
Output Voltage Range 2.63V < V
IN
< 5.5V ● 4.8 5 5.3 V
1.7V
< V
IN
< 2.63V ● 1.85 • V
IN
1.90 • V
IN
1.95 • V
IN
V
V
OUT
Output Voltage Range ● V
ADJ
3.6 V
V
IN
Operating Current I
OUT
= 10µA ● 100 200 µA
V
IN
Shutdown Current V
SHDN
= 0V 1 5 µA
V
ADJ
Regulation Voltage (Note 5) 1mA < I
OUT
< 300mA, 1.7V < V
IN
< 5.5V, ● 0.392 0.4 0.408 V
V
OUT
= 1.5V
I
ADJ
ADJ Input Current V
ADJ
= 0.4V ● –50 0 50 nA
OUT Load Regulation (Referred to ADJ Pin) I
OUT
= 1mA to 300mA –0.2 mV
Dropout Voltage (Note 6) V
IN
= 1.7V, V
ADJ
= 0.37V, I
OUT
= 300mA ● 45 100 mV
I
OUT
Continuous Output Current ● 300 mA
I
OUT
Short Circuit Output Current V
ADJ
= V
OUT
= 0 760 mA
V
OUT
Output Noise Voltage F = 10Hz to 100kHz, I
OUT
= 150mA 150 µVrms
V
IH
SHDN Input High Voltage ● 1.1 V
V
IL
SHDN Input Low Voltage ● 0.3 V
I
IH
SHDN Input High Current SHDN = V
IN
–1 1 µA
I
IL
SHDN Input Low Current SHDN = 0V –1 1 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 3: The LTC3035 regulator is tested and specified under pulse load
conditions such that T
J
≈ T
A
. The LTC3035 is 100% production tested at
25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process control.
Note 4: Min Operating Input Voltage required for regulation is:
V
IN
> V
OUT
+ V
DROPOUT
and V
IN
> 1.7V
LTC3035
3
3035f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Dropout Voltage vs Load Current
ADJ Voltage vs Input VoltageADJ Voltage vs Temperature
V
IN
Shutdown Current V
IN
No Load Operating Current
V
IN
No Load Operating Current
I
OUT
(mA)
0
70
60
50
40
30
20
10
0
150 250
3035 G01
50 100
200 300
DROPOUT VOLTAGE (mV)
T
A
= 125°C
T
A
= –40°C
T
A
= 25°C
V
IN
(V)
0
0
I
IN
(µA)
1.0
2.0
3.0
1
2
34
LT1108 • TPC12
5
4.0
5.0
0.5
1.5
2.5
3.5
4.5
6
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
V
IN
(V)
3
115
110
105
100
95
90
85
80
4.5 5.5
3035 G03
3.5 4
56
I
IN
(µA)
V
OUT
= 3.3V
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
T
A
= 125°C
V
IN
(V)
0
60
I
IN
(µA)
70
80
90
100
120
1
234
3035 G04
56
110
V
OUT
= 1.5V
T
A
= –40°C
T
A
= 25°C
T
A
= 125°C
T
A
= 85°C
TEMPERATURE (°C)
–45
396
ADJUST VOLTAGE (mV)
397
399
400
401
402
403
–5
35
55
3035 G05
398
–25 15
75
95
115
404
V
OUT
= 3.3V
V
IN
(V)
0
ADJ VOLTAGE (mV)
4
3035 G06
2
1
5
36
404
403
402
401
400
399
398
397
396
V
OUT
= 1.5V
ELECTRICAL CHARACTERISTICS
Note 5: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must
be limited.
Note 6: Dropout voltage is minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to V
IN
– V
DROPOUT
.
P1-P3P4-P6P7-P9P10-P12

LTC3035EDDB#TRPBF

Mfr. #:
Buy LTC3035EDDB#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LDO Voltage Regulators 300mA VLDO w/ Charge Pump Bias Generator in DFN-8
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet