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LDO Regulator. RT9037 Datasheet

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LDO Regulator. RT9037 Datasheet






RT9037 Regulator. Datasheet pdf. Equivalent




RT9037 Regulator. Datasheet pdf. Equivalent





Part

RT9037

Description

Ultra-Fast CMOS LDO Regulator



Feature


RT9037 300mA, Low Noise, Ultra-Fast CMO S LDO Regulator General Description Th e RT9037 is designed for portable RF an d wireless applications with demanding performance and space requirements. The RT9037 performance is optimized for ba ttery-powered systems to deliver ultra low noise and low quiescent current. Re gulator ground current increases only s lightly in dropout.
Manufacture

Richtek

Datasheet
Download RT9037 Datasheet


Richtek RT9037

RT9037; , further prolonging the battery life. T he RT9037 also works with low-ESR ceram ic capacitors, reducing the amount of b oard space necessary for power applicat ions, critical in hand-held wireless de vices. The RT9037 consumes less than 0. 01uA in shutdown mode and has fast turn -on time less than 50us. The other feat ures include ultra low dropout voltage, high output accur.


Richtek RT9037

acy, current limiting protection, and hi gh ripple rejection ratio. Available in the SOT-23-5 package, the RT9037 also offers a wide output voltage range from 3.3V to 5V with 0.1V per step. Orderi ng Information RT9037 Package Type B : SOT- 23-5 BR : SOT- 23-5 (R-Type) Lea d Plating System G : Green (Halogen Fre e and Pb Free) Note : Output Voltage 33 : 3.3V 34 : 3.4.


Richtek RT9037

V : 49 : 4.9V 50 : 5.0V 1H : 1.85V 2H : 2.85V 4G : 4.75V Richtek products are : ` RoHS compliant and compatible with the current require- ments of IPC/JED EC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. Mar king Information For marking informatio n, contact our sales representative dir ectly or through a Richtek distributor located in your ar.

Part

RT9037

Description

Ultra-Fast CMOS LDO Regulator



Feature


RT9037 300mA, Low Noise, Ultra-Fast CMO S LDO Regulator General Description Th e RT9037 is designed for portable RF an d wireless applications with demanding performance and space requirements. The RT9037 performance is optimized for ba ttery-powered systems to deliver ultra low noise and low quiescent current. Re gulator ground current increases only s lightly in dropout.
Manufacture

Richtek

Datasheet
Download RT9037 Datasheet




 RT9037
RT9037
300mA, Low Noise, Ultra-Fast CMOS LDO Regulator
General Description
The RT9037 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9037 performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. Regulator ground current increases
only slightly in dropout, further prolonging the battery life.
The RT9037 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices. The
RT9037 consumes less than 0.01uA in shutdown mode
and has fast turn-on time less than 50us. The other features
include ultra low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the SOT-23-5 package, the RT9037 also offers
a wide output voltage range from 3.3V to 5V with 0.1V per
step.
Ordering Information
RT9037
Package Type
B : SOT- 23-5
BR : SOT- 23-5 (R-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Output Voltage
33 : 3.3V
34 : 3.4V
:
49 : 4.9V
50 : 5.0V
1H : 1.85V
2H : 2.85V
4G : 4.75V
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9037-01 April 2011
Features
z Low-Noise for RF Application
z Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50us)
z < 0.01uA Standby Current When Shutdown
z Low Dropout : 220mV @ 300mA
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient
z Current Limiting Protection
z Thermal Shutdown Protection
z Only 1uF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and Halogen Free
Applications
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops, Notebook Computers
z Hand-Held Instruments
z PCMCIA Cards
z Portable Information Appliances
Pin Configurations
(TOP VIEW)
VIN VOUT
54
23
EN NC GND
SOT-23-5
VOUT
5
NC
4
23
VIN GND EN
SOT-23-5 (R-Type)
www.richtek.com
1




 RT9037
RT9037
Typical Application Circuit
VIN CIN
1uF
Chip Enable
On
Off
RT9037
VIN VOUT
EN GND
VOUT
COUT
1uF
Functional Pin Description
Pin Name Pin Function
EN
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ
resistor connected to GND when the control signal is floating.
NC No Internal Connection.
GND
Gro und.
VOUT
Output Voltage.
VIN Input Voltage.
Function Block Diagram
EN Shutdown
and
Logic Control
VREF
- MOS Driver
Error
Amplifier
Current-Limit
and
Thermal Protection
VIN
VOUT
GND
www.richtek.com
2
DS9037-01 April 2011




 RT9037
RT9037
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6V
z Power Dissipation, PD @ TA = 25°C
SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 400mW
z Package Thermal Resistance (Note 2)
SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W
z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------------- 65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 4)
z Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
z EN Input Voltage ----------------------------------------------------------------------------------------------------------- 0V to 5.5V
z Junction Temperature Range -------------------------------------------------------------------------------------------- 40°C to 125°C
z Ambient Temperature Range -------------------------------------------------------------------------------------------- 40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1uF, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Output Voltage Accuracy
Current Limit
ΔV OU T
ILIM
IOUT = 1mA
RLOAD = 1Ω
Quiescent Current
Dropout Voltage (Note 5)
Line Regulation
Load Regulation
Shutdown Current
EN Input Bias Current
IQ
VDROP
ΔVLINE
ΔVLOAD
ISHDN
IIBEN
VEN 1.2V, IOUT = 0mA
IOUT = 200mA
IOUT = 300mA
VIN = (VOUT + 1V) to 5.5V,
IOUT = 1mA
1mA < IOUT < 300mA
VEN = GND, Shutdown
VEN = GND or VIN
EN Threshold Logic-Low Voltage VIL
Logic-High Voltage VIH
VIN = 3V to 5.5V, Shutdown
VIN = 3V to 5.5V, Enable
Power Supply f = 100Hz
Rejection Rate f = 10kHz
PSRR
COUT = 1uF, IOUT = 100mA
Thermal Shutdown Temperature
Thermal Shutdown Temperature
Hysteresis
TSD
ΔTSD
Min Typ Max Unit
2 -- +2 %
360 400 -- mA
-- 90 130 uA
-- 170 200
mV
-- 220 330
-- -- 0.3 %
-- -- 0.6
-- 0.01 1
-- 0 100
-- -- 0.4
1.2 --
--
%
uA
nA
V
-- 60 --
-- 30 --
-- 165 --
dB
°C
-- 30 -- °C
DS9037-01 April 2011
www.richtek.com
3



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