®
RT9076
25μA I
Q
, 250mA Low-Dropout Linear Regulator
μ
General Description
The RT9076 is a low-dropout (LDO) linear regulator that
features high input voltage, low dropout voltage, ultra-low
operating current, and miniaturized packaging. With
quiescent current as low as 25μA, the RT9076 is ideal for
battery-powered equipment.
The RT9076's stability requirements are easily met with
all types of output capacitors, including tiny ceramic
capacitors, over its wide input range and its load current
range (0mA to 250mA). The RT9076 offers standard output
voltages of 1.2V, 1.5V, 1.8V, 2.5V and 3.3V.
Features
μ
25μA Quiescent Current
±
2% Output Accuracy
250mA Output Current
Dropout Voltage : 0.4V at 200mA
Fixed Output Voltage 1.2V/1.5V/1.8V/2.5V/3.3V
Stable with Ceramic or Tantalum Capacitor
Current Limit Protection
Over-Temperature Protection
SOT-23-3 Packages
RoHS Compliant and Halogen Free
Applications
Ordering Information
RT9076-
Package Type
V : SOT-23-3
VN : SOT-23-3 (N-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Voltage
12 : 1.2V
:
33 : 3.3V
Special request: Any output voltage
between 1.2V and 3.3V under
specific business agreement
Note :
Richtek products are :
½
Portable, Battery Powered Equipment
Ultra Low Power Microcontrollers
Pin Configurations
(TOP VIEW)
GND
3
2
VCC
VOUT
SOT-23-3
VCC
3
2
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
GND
VOUT
½
Suitable for use in SnPb or Pb-free soldering processes.
SOT-23-3 (N-Type)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Simplified Application Circuit
V
CC
C
IN
RT9076
VCC
VOUT
GND
V
OUT
C
OUT
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9076-01 February 2016
www.richtek.com
1
RT9076
Functional Pin Description
Pin No.
SOT-23-3
1
2
3
SOT-23-3 (N-Type)
3
2
1
Pin Name
VCC
VOUT
GND
Pin Function
Supply Voltage Input.
Output of the Regulator.
Ground.
Function Block Diagram
VCC
VOUT
OCP
OTP
GND
-
+
R1
Bandgap
Reference
R2
Operation
The RT9076 is a high input voltage linear regulator
specifically designed to minimize external components.
The minimum required output capacitance for stable
operation is 1μF effective capacitance after consideration
of the temperature and voltage coefficient of the capacitor.
Output Transistor
The RT9076 includes a built-in low on-resistance
P-MOSFET output transistor for low dropout voltage
applications.
Error Amplifier
The Error Amplifier compares the output feedback voltage
from an internal feedback voltage divider to an internal
reference voltage and controls the P-MOSFET's gate
voltage to maintain output voltage regulation.
Current Limit
The RT9076 provides a current limit function to prevent
damage during output over-load or shorted-circuit
conditions. The output current is detected by an internal
sensing transistor.
Over-Temperature Protection
The over-temperature protection function will turn off the
P-MOSFET when the internal junction temperature
exceeds 150°C (typ.) and the output current exceeds
30mA. Once the junction temperature cools down by
approximately 20°C, the regulator will automatically
resume operation.
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS9076-01 February 2016
RT9076
Absolute Maximum Ratings
(Note 1)
−0.3V
to 7V
−7V
to 0.3V
−0.3V
to 7V
0.41W
243.3°C/W
VCC to GND -----------------------------------------------------------------------------------------------------------------
VOUT to VCC ---------------------------------------------------------------------------------------------------------------
VOUT to GND ---------------------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
SOT-23-3 ---------------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 2)
SOT-23-3,
θ
JA
----------------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C
Junction Temperature ------------------------------------------------------------------------------------------------------ 150°C
Storage Temperature Range ---------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ------------------------------------------------------------------------------------------------------ 200V
(Note 4)
Recommended Operating Conditions
Supply Input Voltage, VCC ----------------------------------------------------------------------------------------------- 2.5V to 6V
Junction Temperature Range ---------------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
((V
OUT
+ 1) < V
CC
< 6V, T
A
= 25°C, unless otherwise specified.)
Parameter
Output Voltage Range
DC Output Accuracy
Dropout Voltage
Quiescent Current
Line Regulation
Symbol
V
OUT
Test Conditions
I
LOAD
= 1mA
Min
1.2
2
--
--
--
--
--
--
--
--
--
--
300
--
--
Typ
--
--
0.4
0.3
25
0.6
0.6
1
0.7
0.6
70
40
400
150
20
Max
3.3
2
1.2
1
50
1
1.3
1.4
1.2
1
--
--
500
--
--
Unit
V
%
V
A
%
V
Drop
I
Q
I
LOAD
= 0.2A, V
OUT
3V
I
LOAD
= 0.1A, V
OUT
< 3V
I
LOAD
= 20mA
I
LOAD
= 1mA, V
OUT
> 1.8V
I
LOAD
= 1mA, V
OUT
1.8V
10mA < I
LOAD
< 200mA, V
OUT
< 1.5V
10mA < I
LOAD
< 200mA,
1.5V
V
OUT
< 2.5V
10mA < I
LOAD
< 250mA, V
OUT
2.5V
f = 100Hz, I
OUT
= 50mA
f = 10kHz, I
OUT
= 50mA
V
OUT
= 0.5 x V
OUT(Normal)
I
LOAD
= 30mA
I
LOAD
= 30mA
Load Regulation
%
Power Supply Rejection
Ratio
Output Current Limit
OTP Threshold
OTP Hysteresis
PSRR
dB
mA
C
C
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9076-01 February 2016
www.richtek.com
3
RT9076
Note 1.
Stresses beyond those listed
“Absolute
Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2.
θ
JA
is measured at T
A
= 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Typical Application Circuit
RT9076
VCC
VOUT
GND
V
CC
C
IN
1µF
V
OUT
C
OUT
(Effective Capacitance
1µF)
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS9076-01 February 2016
RT9076
Typical Operating Characteristics
Output Voltage vs. Temperature
3.32
3.31
3.32
3.31
Output Voltage vs. Output Current
Output Voltage (V)
3.30
3.29
3.28
3.27
3.26
Output Voltage (V)
I
LOAD
= 0mA
I
LOAD
= 10mA
I
LOAD
= 20mA
3.30
3.29
3.28
3.27
3.26
V
CC
= 5V, V
OUT
= 3.3V
3.25
-50
-25
0
25
50
75
100
125
3.25
0
30
60
90
120
V
CC
= 5V, V
OUT
= 3.3V
150
180
210
240
270
Temperature (°C)
Output Current (mA)
Output Voltage vs. Input Voltage
3.32
3.31
3.30
3.29
3.28
3.27
3.26
3.25
3.5
4
Quiescent Current vs. Temperature
35
Ground Current (μA)
30
Output Voltage (V)
25
I
LOAD
= 0mA
I
LOAD
= 10mA
I
LOAD
= 20mA
20
15
V
CC
= 3.5V to 6V, V
OUT
= 3.3V
10
4.5
5
5.5
6
V
OUT
= 3.3V, I
LOAD
= 20mA
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Temperature (°C)
Quiescent Current vs. Input Voltage
30
Dropout Voltage vs. Temperature
200
Dropout Voltage (mV)
Ground Current (μA)
25
150
I
LOAD
= 50mA
I
LOAD
= 20mA
I
LOAD
= 10mA
20
100
15
50
V
CC
= 3.5V to 6V, V
OUT
= 3.3V, I
LOAD
= 20mA
10
3.5
4
4.5
5
5.5
6
V
CC
= 5V, V
OUT
= 3.3V
0
-50
-25
0
25
50
75
100
125
Input Voltage (V)
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
Temperature (°C)
is a registered trademark of Richtek Technology Corporation.
DS9076-01 February 2016
www.richtek.com
5
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