LTC3026
1.5A Low Input Voltage
VLDO Linear Regulator
Fea T Descrip T
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Input Voltage Range: The LTC 3026 is a very low dropout (VLDO) linear regula-
1.14V to 3.5V (with Boost Enabled) tor that can operate at input voltages down to 1.14V. The
1.14V to 5.5V (with External 5V Boost) device is capable of supplying 1.5A of output current with
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Low Dropout Voltage: 100mV at I = 1.5A a typical dropout voltage of only 100mV. To allow opera-
OUT
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Adjustable Output Range: 0.4V to 2.6V tion at low input voltages the LTC3026 includes a boost
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Output Current: Up to 1.5A converter that provides the necessary headroom for the
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Excellent Supply Rejection Even Near Dropout internal LDO circuitry.
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Shutdown Disconnects Load from V and V
IN BST
Output current comes directly from the input supply to
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Low Operating Current: I = 950A at V = 1.5V
IN IN
maximize efficiency. The boost converter requires only a
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Low Shutdown Current:
small chip inductor and ceramic capacitor for operation.
I < 1A (Typ), I = 0.1A (Typ)
IN BST
Additionally, the boosted output voltage of one LTC3026
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Stable with 10F or Greater Ceramic Capacitors
can supply the boost voltage for other LTC3026s, thus
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Short-Circuit, Reverse Current Protected
requiring a single inductor for multiple LDOs. A user sup-
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Overtemperature Protected
plied boost voltage can be used eliminating the need for
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Available in 10-Lead MSOP and 10-Lead
an inductor altogether.
(3mm 3mm) DFN Packages
The LTC3026 regulator is stable with 10F or greater
ceramic output capacitors. The device has a low 0.4V
a T
reference voltage which is used to program the output
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High Efficiency Linear Regulator
voltage via two external resistors. The device also has
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Post Regulator for Switching Supplies
internal current limit, overtemperature shutdown, and
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Microprocessor Supply
reverse output current protection. The LTC3026 is avail-
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks able in a small 10-lead MSOP or low profile (0.75mm)
and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are
10-lead 3mm 3mm DFN package.
the property of their respective owners.
Typical a T
1.2V Output Voltage from 1.5V Input Supply Dropout Voltage vs Output Current
150
L1 SW
10H BST
5V BOOST
CONVERTER
4.7F
100
IN
1.2V
V = 1.5V
IN
1.5V
4.7F
2.0V
0.4V +
2.6V
OUT V = 1.2V,
OUT
50
1.5A
8.06k
ADJ C
OUT
OFF ON SHDN
10F
0
LTC3026 100k
4.02k
0 1.0 1.5
0.5
GND PG
I (A)
OUT
3026 TA01a
3026 TA01b
L1: MURATA LQH2MCN100K02
3026ff
1
DROPOUT (mV)
ion pplica
ions pplica
ion uresLTC3026
a Te Maxi Mu M r a T
(Note 1)
V to GND ................................................. 0.3V to 6V Output Short-Circuit Duration .......................... Indefinite
BST
V to GND ................................................... 0.3V to 6V Operating Junction Temperature Range
IN
PG to GND ................................................... 0.3V to 6V (Note 8) ............................................. 40C to 125C
SHDN to GND ............................................ 0.3V to 6.3V Storage Temperature Range .................. 65C to 125C
ADJ to GND .................................. 0.3V to (V + 0.3V) Lead Temperature (MSE, Soldering, 10 sec) .........300C
IN
p in c F T
TOP VIEW
TOP VIEW
IN 1 10 OUT
IN 1 10 OUT
IN 2 9 OUT
IN 2 9 OUT
11
11
GND 3 8 ADJ
GND 3 8 ADJ
GND
GND
SW 4 7 PG
SW 4 7 PG
BST 5 6 SHDN
BST 5 6 SHDN
MSE PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
T = 125C, = 40C/W
JMAX JA
10-LEAD (3mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
T = 125C, = 40C/W
JMAX JA
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
o r Der i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3026EDD#PBF LTC3026EDD#TRPBF LBHW 10-Lead (3mm 3mm) Plastic DFN 40C to 125C
LTC3026IDD#PBF LTC3026IDD#TRPBF LBHW 40C to 125C
10-Lead (3mm 3mm) Plastic DFN
LTC3026EMSE#PBF LTC3026EMSE#TRPBF LTBJB 10-Lead Plastic MSOP 40C to 125C
LTC3026IMSE#PBF LTC3026IMSE#TRPBF LTBJB 10-Lead Plastic MSOP 40C to 125C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3026EDD LTC3026EDD#TR LBHW 10-Lead (3mm 3mm) Plastic DFN 40C to 125C
LTC3026IDD LTC3026IDD#TR LBHW 40C to 125C
10-Lead (3mm 3mm) Plastic DFN
LTC3026EMSE LTC3026EMSE#TR LTBJB 10-Lead Plastic MSOP 40C to 125C
LTC3026IMSE LTC3026IMSE#TR LTBJB 10-Lead Plastic MSOP 40C to 125C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: