Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

LM3280 Datasheet(PDF) 5 Page - Texas Instruments

Part # LM3280
Description  Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
Download  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM3280 Datasheet(HTML) 5 Page - Texas Instruments

  LM3280_15 Datasheet HTML 1Page - Texas Instruments LM3280_15 Datasheet HTML 2Page - Texas Instruments LM3280_15 Datasheet HTML 3Page - Texas Instruments LM3280_15 Datasheet HTML 4Page - Texas Instruments LM3280_15 Datasheet HTML 5Page - Texas Instruments LM3280_15 Datasheet HTML 6Page - Texas Instruments LM3280_15 Datasheet HTML 7Page - Texas Instruments LM3280_15 Datasheet HTML 8Page - Texas Instruments LM3280_15 Datasheet HTML 9Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 27 page
background image
LM3280
www.ti.com
SNOSAU4B – OCTOBER 2006 – REVISED FEBRUARY 2013
Buck Electrical Characteristics
(1)(2)(3) (continued)
Limits in standard typeface are for TA = TJ = 25°C. Limits in boldface type apply over the full operating ambient temperature
range (
−30°C ≤ TA = TJ ≤ +85°C). Unless otherwise noted, specifications apply to the LM3280 with: VIN = ( SVIN = PVIN = )
3.6V, ENBUCK = 3.6V, ENLDO1 = ENLDO2 = ENLDO3 = BYP = 0V, FB = 2V, VCON = 0.267V.
Symbol
Parameter
Conditions
Min.
Typ.
Max
Units
ILIM-PWM
Switch Current Limit
FB = 0V (6)
700
820
940
mA
ILIM-BYP
Bypass FET Current Limit
(7)
800
1000
1200
mA
FOSC
Internal Oscillator Frequency
1.8
2
2.2
MHz
Gain
VCON to VOUT Gain
0.267V
≤ VCON ≤ 1.20V,
3
V/V
VIN = 4.2V
ICON
VCON Input Leakage Current
VCON = 1.2V
10
nA
(6)
Electrical Characteristic table reflects open loop data (FB = 0V and current drawn from SW pin ramped up until cycle by cycle current
limit is activated). Refer to datasheet curves for closed loop data and its variation with regards to supply voltage and temperature.
Closed loop current limit is the peak inductor current measured in the application circuit by increasing output current until output voltage
drops by 10%.
(7)
The current is defined as the load current at which the BYPOUT voltage is 1V lower than PVIN.
Buck System Characteristics
(1) (2)
The following spec table entries are guaranteed by design if the component values in the typical application circuit are used.
These parameters are not guaranteed by production testing.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
TRESPONSE
Time for VOUT to Rise from
VIN = 4.2V, COUT = 4.7µF,
0.8V to 3.4V in PWM Mode
RLOAD = 15Ω
25
µs
L = 2.2 µH (ISAT > 0.94A)
TSTARTUP
Time for VOUT to rise to 3.4V
VIN = 4.2V, COUT = 4.7µF,
in PWM Mode
RLOAD = 15Ω
36
µs
(3)
L = 2.2µH (ISAT = 0.94A)
EN = Low to High
CCON
VCON Input Capacitance
VIN = 3.6V, VCON = 1V,
15
pF
Test Freq. = 100kHz
TON_BYP
Bypass FET Turn On Time In
VIN = 3.6V, VCON = 0.267V,
Bypass Mode
COUT = 4.7µF, RLOAD = 15Ω
30
µs
BYP = Low to High
TBYP
Auto Bypass Detect Delay
(4)
10
15
20
µs
Time
(1)
All voltages are with respect to the potential at the GND pins.
(2)
Shutdown current includes leakage current of PFET and Bypass FET.
(3)
The startup time is the time to reach 90% of 3.4V nominal output voltage from the ENBUCK being low to high.
(4)
SVIN is compared to the programmed output voltage (VOUT). When SVIN – VOUT falls below VBYPASS− for longer than TBYP the Bypass
FET turns on and the switching FETs turn off. This is called the Bypass mode. The device comes out of Bypass mode when SVIN –
VOUT exceeds VBYPASS
+ for longer than T
BYP, and PWM mode returns. The hysteresis for the bypass detection threshold VBYPASS
+
VBYPASS− will always be positive and will be approximately 200mV (typ.).
LDO1, 2, and 3 Electrical Characteristics
(1) (2)
Limits in standard typeface are for TA = TJ = 25°C. Limits in boldface type apply over the full operating ambient temperature
range (
−30°C ≤ TA = TJ ≤ +85°C). Unless otherwise noted, specifications apply to the LM3280 with: VIN = 3.6V, ENBUCK =
3.6V, BYP = 0V, FB = 2V, VCON = 0.267V, ENLDOx = 3.6V
(3).
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VLDO
LDO Output Voltage
VLDO = 2.85V, IOUT = 1mA
-1
+1
%
Accuracy
-2
+2
%
ΔVLDO
Line Regulation
VIN = VLDO(nom) + 0.5V to 5.5V,
0.1
%/V
IOUT = 1mA
Load Regulation
IOUT = 1mA to 20mA
0.01
0.04
%/mA
(1)
All voltages are with respect to the potential at the GND pins.
(2)
Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the
most likely norm.
(3)
The ENLDOx means that the one of ENLDO1, ENLDO2, and ENLDO3 is set high (> 1.2V) and the others are set 0V.
Copyright © 2006–2013, Texas Instruments Incorporated
Submit Documentation Feedback
5
Product Folder Links: LM3280


Similar Part No. - LM3280_15

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM3280TL-275 NSC-LM3280TL-275 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
LM3280TL-280 NSC-LM3280TL-280 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
LM3280TL-290 NSC-LM3280TL-290 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
LM3280TLX-275 NSC-LM3280TLX-275 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
LM3280TLX-280 NSC-LM3280TLX-280 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
More results

Similar Description - LM3280_15

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM3280 NSC-LM3280 Datasheet
794Kb / 22P
   Adjustable Step-Down DC-DC Converter and 3 LDOs for RF Power Management
LM3202 NSC-LM3202 Datasheet
1Mb / 15P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
LM3205 NSC-LM3205_09 Datasheet
1Mb / 18P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
LM3205 NSC-LM3205 Datasheet
1Mb / 18P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
Global Mixed-mode Techn...
G5302 GMT-G5302 Datasheet
77Kb / 1P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
National Semiconductor ...
LM3202 NSC-LM3202_06 Datasheet
3Mb / 16P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
Texas Instruments
LM3205 TI1-LM3205 Datasheet
1Mb / 24P
[Old version datasheet]   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
National Semiconductor ...
LM3208 NSC-LM3208 Datasheet
1Mb / 17P
   650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
Texas Instruments
LM3205 TI-LM3205_15 Datasheet
1Mb / 28P
[Old version datasheet]   LM3205 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
logo
National Semiconductor ...
LM3218 NSC-LM3218 Datasheet
4Mb / 16P
   650 mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com