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EVB_RT9073N-33GB

P1-P3P4-P6P7-P9P10-P12P13-P14
RT9073
®
DS9073-06 June 2017 www.richtek.com
1
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
1
μμ
μμ
μA I
Q
, 250mA Low-Dropout Linear Regulator
Applications
Portable, Battery Powered Equipment
Ultra Low Power Microcontrollers
Notebook Computers
General Description
The RT9073 is a low-dropout (LDO) voltage regulators with
enable function that operates from 1.2V to 5.5V. It provides
up to 250mA of output current and offers low-power
operation in miniaturized packaging.
The features of low quiescent current as low as 1μA and
almost zero disable current is ideal for powering the battery
equipment to a longer service life. The RT9073 is stable
with the ceramic output capacitor over its wide input range
from 1.2V to 5.5V and the entire range of output load
current (0mA to 250mA).
Features
1
μμ
μμ
μA Ground Current at no Load
PSRR = 75dB at 1kHz
Adjustable Output Voltage Available by Specific
Application
±±
±±
±2% Output Accuracy
250mA (V
IN
≥≥
≥≥
≥ 2.3V) Output Current with EN
Low (0.1
μμ
μμ
μA) Disable Current
1.2V to 5.5V Operating Input Voltage
Dropout Voltage : 0.45V (typ.) at 250mA when V
OUT
≥≥
≥≥
≥ 3V
Support Fixed Output Voltage 0.9V, 1.05V, 1.2V, 1.5V,
1.8V, 1.9V, 2.5V, 2.7V, 2.8V, 2.9V, 3V, 3.3V
Stable with Ceramic or Tantalum Capacitor
Current Limit Protection
Over Temperature Protection
SOT-23-5 and SC-70-5 Packages Available
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Ordering Information
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Package Type
B : SOT-23-5
U5 : SC-70-5
RT9073/N-
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Voltage
09 : 0.9V
1K : 1.05V
12 : 1.2V
15 : 1.5V
18 : 1.8V
19 : 1.9V
25 : 2.5V
27 : 2.7V
28 : 2.8V
29 : 2.9V
30 : 3.0V
33 : 3.3V
Special Request : Any Voltage
Between 0.9V and 3.3V under
specific business agreement
Pin Function
RT9073 : With SNS Pin
RT9073N : Without SNS Pin
RT9073
2
DS9073-06 June 2017www.richtek.com
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Pin No.
Pin Name Pin Function
SOT-23-5 SC-70-5
1 1 VIN Supply voltage input.
2 2 GND Ground.
3 3 EN Enable control input.
4 4
SNS Output voltage sense.
NC No internal connection. (RT9073N only)
5 5 VOUT Output of the regulator.
Pin Configuration
(TOP VIEW)
SC-70-5
SOT-23-5
VIN GND EN
VOUT
SNS/NC
4
23
5
VIN
GND
EN
VOUT
SNS/NC
4
3
5
2
RT9073
3
DS9073-06 June 2017 www.richtek.com
©
Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Block Diagram
Operation
Basic operation
The RT9073 is a low quiescent current linear regulator
designed especially for low external components system.
The input voltage range is from 1.2V to 5.5V.
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 RT9073 builds in a P-MOSFET output transistor which
provides a low switch-on resistance for low dropout voltage
applications.
Error Amplifier
The Error Amplifier compares the internal reference voltage
with the output feedback voltage from the internal divider,
and controls the Gate voltage of P-MOSFET to support
good line regulation and load regulation at output voltage.
Enable
The RT9073 delivers the output power when it is set to
enable state. When it works in disable state, there is no
output power and the operation quiescent current is almost
zero.
Current Limit Protection
The RT9073 provides current limit function to prevent the
device from damages during over-load or shorted-circuit
condition. This current is detected by an internal sensing
transistor.
Over Temperature Protection
The over temperature protection function will turn off the
P-MOSFET when the junction temperature exceeds 150°C
(typ.), V
IN
≥ 1.5V and the output current exceeds 30mA.
Once the junction temperature cools down by
approximately 20°C, the regulator will automatically
resume operation.
VIN
GND
EN
VOUT
R1
R2
Current/Thermal
Sense
Bandgap
Reference
SNS
+
-
(without sense
function)
(with sense
function)
P1-P3P4-P6P7-P9P10-P12P13-P14

EVB_RT9073N-33GB

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Description:
EVAL BOARD, LOW-DROPOUT LINEAR REGULATOR
Lifecycle:
New from this manufacturer.
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