Moteur de recherche de fiches techniques de composants électroniques
Selected language     French  ▼
Nom de la pièce
         Description


TPS51120 Datasheet(Fiches technique) 6 Page - Texas Instruments

Click here to check the latest version.
Numéro de pièce TPS51120
Description  DUAL CURRENT MODE, SYNCHRONOUS STEP-DOWN CONTROLLER WITH 100-mA STANDBY REGULATORS FOR NOTEBOOK SYSTEM POWER
Télécharger  10 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo 

 
 6 page
background image
www.ti.com
TPS51120
SLUS670A–JULY 2005–REVISED AUGUST 2005
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VVIN =12V,VVREG5 =VV5FILT = 5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
ON-TIME TIMER, INTERNAL SOFT-START and HOUSEKEEPING CLOCK
TON1a
On time, 5V, 180 kHz
VLL1=12V, VOUT1=5V, TONSEL=5V, TA=25°C
2150
2340
2530
TON1b
On time, 5V, 220 kHz
VLL1=12V, VOUT1=5V, TONSEL=FLOAT, TA=25°C
1790
1950
2110
TON1c
On time, 5V, 280 kHz
VLL1=12V, VOUT1=5V, TONSEL=2V, TA=25°C
1370
1490
1610
TON1d
On time, 5V, 380 kHz
VLL1=12V, VOUT1=5V, TONSEL=GND, TA=25°C
1020
1110
1200
TON2a
On time, 3.3V, 270 kHz
VLL2=12V, VOUT2=3.3V, TONSEL=5V, TA=25°C
940
1030
1120
VLL2==12V, VOUT1=3.3V, TONSEL=FLOAT, TA=
TON2b
On time, 3.3V, 330 kHz
780
850
920
ns
25°C
TON2c
On time, 3.3V, 430 kHz
VLL2==12V, VOUT1=3.3V, TONSEL=2V, TA=25°C
580
650
720
TON2d
On time, 3.3V, 580 kHz
VLL2==12V, VOUT1=3.3V, TONSEL=GND, TA=25°C
430
480
530
TON(MIN)1
Minimum on time, 5V
TA =25°C, TONSEL=GND, VLL1=28V, VO1=1V
70
TON(MIN)2
Minimum on time, 3.3V
TA =25°C, TONSEL=GND, VLL2=28V, VO2=1V
45
TOFF(MIN)
Minimum off time
TA =25°C, VFB=0.9V, LL=0.5V
480
TSS
Internal Soft Start Timer
TA =25°C, ENx>3V
772
clks
SLSS
Internal Soft Start Slope
TA =25°C, ENx>3V, Slope wrt. VFB (2)
0.3
V/ms
FCLK
HK clock frequency
230
290
350
kHz
UVLO/LOGIC THRESHOLD
EN3, EN5, low to high
0.4
0.6
0.8
VENLDOH
LDO enable threshold
Hysteresis
0.2
V
VENLDOFL3 EN3 pullup voltage
EN3 = FLOAT (OPEN)(2)
1.7
VENLDOFL5 EN5 pullup voltage
EN5= FLOAT (OPEN)(2)
3.3
IENLDOFL
EN3, EN5 pullup current
VENx < 0.5V
1.5
4.0
µA
Wake up
3.8
4.0
4.2
V
VUV(VREG5) VREG5 UVLO threshold
Hysteresis
100
200
300
mV
Auto-SKIP Mode Enabled
0
0.7
VSKIPSEL
SKIPSEL threshold
Auto-SKIP Mode Enabled, Faults Off
1.3
2.2
PWM-Only Mode Enabled
2.7
5.5
Fast Switching Frequency
0
0.7
V
Medium Switching Frequency #2
1.3
2.2
VTONSEL
TONSEL threshold
Medium Switching Frequency #1
2.7
3.0
Slow Switching Frequency
4.5
5.5
SKIPSEL, TONSEL=0V
1
3
ISEL
SKIPSEL/TONSEL input current
µA
SKIPSEL, TONSEL=5V
1
2
VENSWSTAT EN1, EN2 SS Start Voltage
BJT Base input, Switcher begins to Track ENx
0.5
0.9
1.2
V
‘Logic High’ Level for Switcher Enable when using
VENSWEND EN1, EN2 SS End Voltage
2.75
2.90
Internal Softstart, 0°C ≤ TA≤ 85°C
IENSW1,2
EN1, EN2 Pullup Current
EN1, EN2=0.6V
1
2
3
µA
VTHVFB1
VFB1 threshold
5.0V preset output
V5FILT -0.3
V
VTHVFB2
VFB2 threshold
3.3V preset output
V5FILT -0.3
CURRENT SENSE
Resistor sense scheme , VPGND - VCS voltage,
VOCL
Current limit threshold
67
80
93
mV
PGOOD=Hi
ITRIP
CS Sink Current
RDS(ON) sense scheme, PGOOD=Hi, TA=25°C
9
10
11
µA
ppm/°
TCITRIP
ITRIP temperature Coefficient
RDS(ON) sense scheme, On the basis of 25°C
4500
C
(2) Ensured by design. Not production tested.
6




Html Pages

1  2  3  4  5  6  7  8  9  10 


Datasheet Download



Numéro de composants électroniques

Numéro de pièceDescription des composantsHtml ViewFabricant
TPS51020DUAL VOLTAGE MODE DDR SELECTABLE SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK SYSTEM POWER 1 2 3 4 5 MoreTexas Instruments
PM6685DUAL STEP-DOWN CONTROLLER WITH AUXILARY VOLTAGES FOR NOTEBOOK SYSTEM POWER 1 2 3 4 5 MoreSTMicroelectronics
MAX798High-Accuracy Step-Down Controller with Synchronous Rectifier for CPU Power 1 2 3 4 5 MoreMaxim Integrated Products
SC1175Low Power Dual Synchronous DC/DC Controller With Current Sharing Circuitry 1 2 3 4 5 MoreSemtech Corporation
SC2677Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry 1 2 3 4 5 MoreSemtech Corporation
MAX1844High-Speed Step-Down Controller with Accurate Current Limit for Notebook Computers 1 2 3 4 5 MoreMaxim Integrated Products
MAX1638High-Speed Step-Down Controller with Synchronous Rectification for CPU Power 1 2 3 4 5 MoreMaxim Integrated Products
MAX1639High-Speed Step-Down Controller with Synchronous Rectification for CPU Power 1 2 3 4 5 MoreMaxim Integrated Products
MAX797HHigh-Voltage Step-Down Controller with Synchronous Rectifier for CPU Power 1 2 3 4 5 MoreMaxim Integrated Products
TPS51124DUAL SYNCHRONOUS STEP-DOWN CONTROLLER FOR LOW VOLTAGE POWER RAILS 1 2 3 4 5 MoreTexas Instruments

Lien URL

AllDATASHEET vous a-t-il été utile ?   [ DONATE ]  

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Favoris   |   Echange de liens   |   Fabricants
All Rights Reserved © Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , 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