LTC3026-1_15 Datasheet, PDF (1/16 Pages) Linear Technology – 1.5A Low Input Voltage VLDO Linear Regulator

FEATURES
n _{Input Voltage Range: 1.14V to 5.5V}
n _{Low Dropout Voltage: 100mV at IOUT = 1.5A}
n _{Adjustable Output Range: 0.4V to 2.6V}
n _{Output Current: Up to 1.5A}
n _{Excellent Supply Rejection Even Near Dropout}
n _{Shutdown Disconnects Load from VIN and VBST}
n _{Low Operating Current:}
I_IN = 95μA at V_IN = 1.5V
I_BIAS = 175μA at V_BIAS = 5V
n _{Low Shutdown Current:}
I_IN < 1μA (Typ), I_BST = 0.1μA (Typ)
n _{Stable with 10μF or Greater Ceramic Capacitors}
n _{Short-Circuit, Reverse Current Protected}
n _{Overtemperature Protected}
n _{Available in 10-Lead MSOP and 10-Lead}
(3mm × 3mm) DFN Packages
APPLICATIONS
n _{High Efficiency Linear Regulator}
n _{Post Regulator for Switching Supplies}
n _{Microprocessor Supply}
LTC3026-1
1.5A Low Input Voltage
VLDO Linear Regulator
DESCRIPTION
The LTC^®3026-1 is a very low dropout (VLDO™) linear
regulator that can operate at input voltages down to
1.14V. The device is capable of supplying 1.5A of output
current with a typical dropout voltage of only 100mV.
Output current comes directly from the input supply to
maximize efficiency.
The LTC3026-1 is the same as the LTC3026 but has the
boost converter internally disabled. With the boost con-
verter disabled, the SW pin of the LTC3026 is replaced with
a ground pin and the BST pin is replaced with a BIAS pin
that requires an external 5V supply for operation.
The LTC3026-1 regulator is stable with 10μF or greater
ceramic output capacitors. The device has a low 0.4V
reference voltage which is used to program the output
voltage via two external resistors. The device also has
internal current limit, overtemperature shutdown, and
reverse output current protection. The LTC3026-1 is avail-
able in a small 10-lead MSOP or low profile (0.75mm)
10-lead 3mm × 3mm DFN package.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
TYPICAL APPLICATION
1.2V Output Voltage from 1.5V Input Supply
V_IN = 1.5V
LTC3026-1
BIAS
IN
1μF
0.4V +
–
OUT
OFF ON
SHDN
ADJ
GNDS
GND
PG
V_BIAS = 5V
1μF
8.06k
100k _4.02k
V_OUT = 1.2V,
1.5A
C_OUT
10μF
30261 TA01a
Dropout Voltage vs Output Current
150
100
1.2V
1.5V
2.0V
2.6V
50
0
0
0.5
1.0
1.5
I_OUT (A)
30261 TA01b
30261f
1