Fremont Micro Devices
FT533xx
Fast Start-up, Ultra Low Noise, High PSRR, 400mA LDO
FEATURES
Ultra-Low Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Quick Start-Up (Typically 25µS)
Low Quiescent Current: 65µA
Less than 0.1µA Standby Current When
Shutdown
Low Dropout Voltage: 100mV @ 100mA,
420mV @ 400mA (Vout=2.8V)
Wide Operating Voltage Ranges : 2.5V to 6V
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Current Limiting Protection
Only 1µF Output Capacitor Required
High Power Supply Rejection Ratio
ROHS Compliant and 100% Lead (Pb)-Free
Custom Voltage Available
Custom Options for CE Logic and Build-in
Pull-up/down Available
The FT533xx also works with low-ESR ceramic
capacitors, reducing the amount of board space
necessary
for
power
applications,
critical
in
hand-held wireless devices. The FT533xx consumes
less than 0.1µA in shutdown mode and has fast
turn-on time less than 25µS. The other features
include low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection
ratio. The FT533xx is available in the 5-lead of
SOT-23-5(L), SC-70 and the 3-lead of SOT-23-3(L),
SOT-89-3(L), SOT-23 packages.
DESCRIPTION
The FT533xx is designed for portable RF and
wireless applications with demanding performance
and space requirements. The FT533xx 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.
APPLLICATIONS
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances
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DS533-A2
Fremont Micro Devices
TYPICAL APPLICATION CIRCUIT
FT533xx
Figure 1: Typical Application Circuit
ABSOLUTE MAXIMUM RATINGS
Supply Input Voltage ----------------------------------------------------------------------------------------------------- 6V
Power Dissipation, PD@ TA=27
SOT-23-5(L) ---------------------------------------------------------------------------------------------------- 400mW
SOT-23-3(L) ---------------------------------------------------------------------------------------------------- 400mW
SOT-89-3(L) ---------------------------------------------------------------------------------------------------- 600mW
SC-70 ------------------------------------------------------------------------------------------------------------ 300mW
SOT-23 ----------------------------------------------------------------------------------------------------------- 250mW
Package Thermal Resistance
SOT-23-5(L) --------------------------------------------------------------------------------------------------- 250
SOT-23-3(L) --------------------------------------------------------------------------------------------------- 250
SOT-89-3(L) --------------------------------------------------------------------------------------------------- 170
SC-70 ----------------------------------------------------------------------------------------------------------- 330
SOT-23 --------------------------------------------------------------------------------------------------------- 380
Storage Temperature Range -----------------------------------------------------------------------------
ESD Susceptibility
Lead Temperature (Soldering, 10sec.) ------------------------------------------------------------------------------ 260
60
to 150
HBM (Human Body Mode) -----------------------------------------------------------------------------------------4kV
MM (Machine Mode) --------------------------------------------------------------------------------------------200V
*
Stresses exceed those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. Functional operation of the device at conditions beyond those listed in the specification is not
guaranteed. Prolonged exposure to extreme conditions may affect device reliability or functionality.
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Fremont Micro Devices
PIN CONFIGURATION
FT533xx
Figure 2: Pin Configuration
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DS533-A2
Fremont Micro Devices
TERMINAL FUNCTION
Pin Name
EN
VIN
VOUT
NC
GND
Function
Chip Enable (Active High). No Pull-Down Resistor Build-in
For packages SOT-23-3(L) ,SOT-89-3(L) and SOT-23
internally connected to VIN
Power Input Voltage
Output Voltage
No Connection
Ground
Table 1
FT533xx
ORDERING INFORMATION
FT533
Designator
Symbol
D
E
F
G
Output Voltage
1.8V
2.5V
2.7V
2.8V
2.85V
3.0V
3.3V
3.6V
4.2V
H
I
J
K
L
Table 2
Designator
Symbol
a
b
c
d
Pin Configuration
SOT-23-5A
SOT-23-5B
SOT-23-5C
SC-70A
SC-70B
SC-70C
SOT-23-3A
SOT-23A
SOT-89-3A
Table 3
Package Type
SOT-23-5(L)
e
f
g
h
i
SC-70 / SOT-353
SOT-23-3(L)
SOT-23
SOT-89-3(L)
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Page 4 of 21
，
the EN is
①
②
②①
DS533-A2
Fremont Micro Devices
MARKING RULE
FT533xx
Figure 3: Top View
Represent Product Series
Symbol
5
Product Series
FT533xx
~ 85
Represent Output Voltage and operating temperature range
G represent the output voltage is 2.8V, operating temperature is –40
for internal reference
.
BLOCK DIAGRAM
Figure 4: Block Diagram
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DS533-A2
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