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FAN2535S285X

P1-P3P4-P6P7-P9P10-P11
www.fairchildsemi.com
REV. 1.0.2 8/26/03
Features
• 70dB Ripple rejection ( >45dB up to 1MHz)
• 150µsec Power On Time
• 150µsec Enable Time
•Low noise - 50µVrms
• Enable optimized for CDMA time slices
• 180 mV dropout voltage at 150 mA
• Enable/Shutdown Control
• Enable time independent of noise bypass capacitor value
•SOT23-5 package
• Thermal limiting
• 300 mA trimmed current limit
Applications
• Cellular Phones and accessories
•PDAs
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers
Description
The FAN2534/FAN2535 family of micropower low-dropout
voltage regulators utilize CMOS technology to offer a new
level of cost-effective performance in GSM, TDMA, and
CDMA cellular handsets, laptop and notebook computers,
and other portable devices. Proprietary design technics
ensure high ripple rejection. Other features include low
noise, short circuit current limit, thermal shutdown circuit,
low dropout voltage, fast enable required in CDMA handset
applications, exceptional loop stability to accommodate a
wide variety of external capacitors, and a compact SOT23-5
surface-mount package. These products offer significant
improvements over older Bipolar and CMOS designs and are
pin-compatible with many popular devices.
The FAN2534 and FAN2535 devices are distinguished by
the assignment of pin 4:
FAN2534:
pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2534-XX:
pin 4 – BYP, to which a bypass capacitor
may be connected for optimal noise performance. Output
voltage is fixed, as specified by the suffix XX.
FAN2535-XX:
pin 4 – ERR, a flag which indicates that the
output voltage has dropped below the specified minimum
due to a fault condition.
The standard fixed output voltages available are 2.6V, 2.85V,
and 3.0V . Custom output voltages are also available: please
contact your local Fairchild Sales Office for information.
FAN2534/FAN2535
150 mA CMOS LDO Regulator with Fast Start, Enable
Block Diagrams
FAN2534
EN
ADJ
GND
Thermal
Sense
p
V
IN
V
OUT
Bandgap
Error
Amplifier
FAN2534-XX
EN
BYP
GND
GND
Bandgap
Thermal
Sense
p
Error
Amplifier
V
IN
V
OUT
FAN2535-XX
EN
ERR
Bandgap
Thermal
Sense
p
Error
Amplifier
V
IN
V
OUT
2
REV. 1.0.2 8/26/03
FAN2534/FAN2535 PRODUCT SPECIFICATION
Pin Assignments
Pin Descriptions
Absolute Maximum Ratings
(Note 1)
Pin No. FAN2534 FAN2534-XX FAN2535-XX
1. V
IN
V
IN
V
IN
2. GND GND GND
3. EN EN EN
4. ADJ BYP ERR
5. V
OUT
V
OUT
V
OUT
Pin Name Pin No. Type Pin Function Description
ADJ 4 Input
FAN2534 Adjust.
Ratio of potential divider from VOUT to ADJ
determines output voltage.
BYP 4 Passive
FAN2534-XX Bypass.
Connect 10 nF capacitor for noise reduction.
ERR
4 Open drain
FAN2535-XX Error.
Error flag output.
LOW when
Vout< 95% of nominal; HIGH when Vout> 95% of nominal.
EN 3 Digital Input
Enable.
LOW in Shutdown Mode; HIGH in Enable Mode
V
IN
1 Power in
Voltage Input.
Supply voltage input.
V
OUT
5 Power out
Voltage Output.
Regulated output voltage.
GND 2 Power
Ground.
Parameter Min. Typ. Max. Unit
Power Supply Voltages
V
IN
(Measured to GND); Enable Input (EN);
ERR
Output;
07V
Power Dissipation Internally limited
Operating Junction Temperature -65 150 °C
Lead Soldering (5 seconds) 260 °C
Storage -65 150 °C
Electrostatic Discharge (Note 2) 4 kV
5
3
FB
SHDN
CAP+
CAP-
GND
V
IN
V
OUT
EN
ADJ/BYP/ERR
1
4
2
REV. 1.0.2 8/26/03
3
PRODUCT SPECIFICATION FAN2534/FAN2535
Operating Conditions
DC Electrical Characteristics
(Notes 4, 5)
Symbol Parameter Min. Typ. Max. Units
V
IN
Input Voltage Range V
OUT
+
V
DO
6.5 V
V
OUT
Output Voltage Range
FAN2534-XX, FAN2535-XX (Note 3)
2.3 3.3 V
V
OUT
Output Voltage Range (FAN2534 only) 2.0 5.0 V
V
EN
Enable Input Voltage 0 V
IN
V
V
ERR
ERR
Flag Voltage V
IN
V
T
J
Junction Temperature -40 +125 °C
θ
JA
Thermal resistance 220 °C/W
θ
JC
Thermal resistance 130 °C/W
Symbol Parameter Conditions Min. Typ. Max. Units
Regulator
V
DO
Drop Out Voltage (Note 6)
I
OUT
= 100 µA 2.5 4 mV
I
OUT
= 50 mA 50 75 mV
I
OUT
= 100 mA 100 140 mV
I
OUT
= 150 mA 180 220 mV
∆
V
O
Output Voltage Accuracy
(Note 7)
Initial Accuracy at no
load
-1 1 %
Over Line, Load &
Temp
-3.7 2
%
I
GND(NL)
Ground Pin Current
No Load 90 µA
I
GND(FL)
Ground Pin Current
I
OUT
= 150 mA 110 µA
Protection
Current Limit
300
400
mA
I
GSD
Shut-Down Current
EN = 0V
1
µA
T
SH
Thermal Shutdown
Temperature
Hysteresis
155
15
°C
°C
E
TL
ERR Trip Level
FAN2535 only 90 93 96 %
Enable Input
V
EL
Logic Low Voltage
0.4 1.2 V
V
EH
Logic High Voltage
1.4 2 V
I
EH
Input Current High
1µA
I
EL
Input Current Low
1µA
P1-P3P4-P6P7-P9P10-P11

FAN2535S285X

Mfr. #:
Buy FAN2535S285X
Manufacturer:
ON Semiconductor / Fairchild
Description:
LDO Voltage Regulators 150ma CMOS LDO Fast Start
Lifecycle:
New from this manufacturer.
Delivery:
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