Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

LM27212SQX Arkusz danych(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numer części LM27212SQX
Szczegółowy opis  Two-Phase Current-Mode Hysteretic Buck Controller
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM27212SQX Arkusz danych(HTML) 3 Page - National Semiconductor (TI)

  LM27212SQX Datasheet HTML 1Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 2Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 3Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 4Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 5Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 6Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 7Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 8Page - National Semiconductor (TI) LM27212SQX Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 3 / 23 page
background image
Pin Descriptions (TSSOP)
Pin 1, VID0: First and least significant bit to program the
output voltage, as specified in VID Code table.
Pin 2, VID1: 2nd bit to program the output voltage, as
specified in VID Code table.
Pin 3, VID2: 3rd bit to program the output voltage, as speci-
fied in VID Code table.
Pin 4, NC: No connect.
Pin 5, VID3: 4th bit to program the output voltage, as speci-
fied in VID Code table.
Pin 6, NC: No connect.
Pin 7, VID4: 5th bit to program the output voltage, as speci-
fied in VID Code table.
Pin 8, VID5: 6th and most significant bit to program the
output voltage, as specified in VID Code table.
Pin 9, STP_CPU#: When this pin is logic low, VREF voltage
is equal to that on the VSTP pin. This pin offers the power
supply designer a way to dynamically (meaning when the
regulator is running) lower the output voltage by a preset
percentage of the VREF value.
Pin 10, SLP: When this pin is logic high, VREF voltage is
equal to that on the SLP pin. The pin offers the power supply
designer a way to dynamically (meaning when the regulator
is running) change the output voltage to a preset fixed value.
Pin 11, VRON: Chip enable input. When this pin goes high,
soft start begins. When this pin goes low, soft shutdown
begins.
Pin 12, VREF: Desired regulator output voltage under no
load.
Pin 13, VSLP: Desired Sleep mode output voltage. Connect
this pin to the desired reference level. See the typical appli-
cation circuit. Also refer to the Pin 10 definition.
Pin 14, VSTP: Desired Stop CPU mode output voltage.
Connect this pin to the desired reference level. See the
typical application circuit. Also refer to the Pin 9 definition.
Pin 15, VBOOT: Initial output voltage desired after soft start
completes. Connect this pin to the desired reference level.
This pin offers the power supply designer a way to start into
a different voltage than the final desired value. The output
voltage will start slewing (in a controlled manner) to the value
defined by the VID pins about 25µs after output voltage
reaches VBOOT. See Timing Diagram.
Pin 16, SGND: Signal ground.
Pin 17, VDAC: Buffered Digital-to-Analog converter output.
Pins 18 P_Z1: Reference adjust, do not connect.
Pin 19, NC: No connect.
Pins 20 P_Z0: Reference adjust, do not connect.
Pin 21, NC: No connect.
Pin 22, TGND: Reserved for test purpose. Must be con-
nected to signal ground.
Pin 23, V1R7: 1.7V reference voltage.
Pin 24, SS: Soft start, soft shutdown and slew rate control.
Connect a capacitor between this pin and ground to control
the soft start and soft shutdown speed. The value of the
capacitor will also define the slew rate of the output voltage
swings. There is an internal current source charging or dis-
charging the capacitor at this pin. The current for soft start
and soft shutdown is typically 22µA and 45µA respectively,
and the current for dynamic output voltage swing (whether it
is a Dynamic VID change or it is a change to or from Stop
CPU or Sleep Mode) is typically 335µA.
Pin 25, PGOOD: Power good flag. Open-drain when output
voltage enters the power good window and XPOK is as-
serted. Masked during dynamic output voltage transitions.
See Timing Diagram for further details.
Pin 26, XPOK: Power good control. Only when this pin is a
logic high can PGOOD pin be pulled high. Connect this pin to
the power good flag of another regulator if the latter needs to
be powered up first.
Pin 27, SENSE: Regulator output voltage sense. Connect
directly to output.
Pin 28, NC: No connect.
Pin 29, CLK_EN#: An output signal provided as a conve-
nience to enable an external logic circuit if needed. It is
asserted typically 18µs after both XPOK is high and the
output voltage is within power good window.
Pin 30, NC: No connect.
Pin 31, VOVP: Over-voltage protection level. Connect this
pin to the desired reference voltage to set the trigger level for
over-voltage protection.
Pins 32, CMPREF: Inductor current reference. Voltage be-
tween this pin and the regulator output determines the in-
ductor current.
Pin 33, CMP2: Current sense for Channel 2. Voltage be-
tween this pin and the regulator output is compared with the
voltage between inductor current reference (Pin 32) and the
regulator output to control the inductor current.
Pin 34, CMP1: Current sense for Channel 1. Voltage be-
tween this pin and the regulator output is compared with the
voltage between inductor current reference (Pin 32) and the
regulator output to control the inductor current.
Pin 35, SYNC2: Connect to the LEN pin of the LM27222
driver to enable or disable the turning on of the bottom power
FET.
Pin 36, OUT2: Channel 2 pulse output to control the switch-
ing of the external MOSFET driver such as the LM27222.
Pin 37, DGND: Digital ground.
Pin 38, VDD: Chip power supply.
Pin 39, OUT1: Channel 1 pulse output to control the switch-
ing of the external MOSFET driver such as the LM27222.
Pin 40, SYNC1: Connect to the LEN pin of the LM27222
driver to enable or disable the turning on of the low-side
power FET.
Pin 41, ILIMREF: Current limit reference. Voltage between
this pin and the regulator output sets the inductor current
limit level.
Pin 42, ILIM2: Current limit sense for Channel 2. Voltage
between this pin and the regulator output is the voltage
across the current sense resistor.
Pin 43, NC: No connect.
Pin 44, ILIM1: Current limit sense for Channel 1. Voltage
between this pin and the regulator output is the voltage
across the current sense resistor.
Pin 45, NC: No connect.
Pin 46, SRCK1: Kelvin connect to Channel 1 bottom FET
source node (ground) to detect negative inductor current.
Pin 47, SW1: Connect to Channel 1 switch node (drain of
low-side power FET) to detect negative inductor current.
Pin 48, DE_EN#: Diode emulator mode trigger signal. When
the IC is in Sleep mode, if this pin is logic low, the regulator
will shut down Channel 2 and force Channel 1 to run in diode
emulation mode (bottom FET is turned off when inductor
current goes negative).
www.national.com
3


Podobny numer części - LM27212SQX

ProducentNumer częściArkusz danychSzczegółowy opis
logo
National Semiconductor ...
LM27213 NSC-LM27213 Datasheet
958Kb / 22P
   Single Phase Hysteretic Buck Controller
logo
Texas Instruments
LM27213 TI-LM27213 Datasheet
1Mb / 32P
[Old version datasheet]   LM27213 Single Phase Hysteretic Buck Controller
logo
National Semiconductor ...
LM27213MTD NSC-LM27213MTD Datasheet
958Kb / 22P
   Single Phase Hysteretic Buck Controller
logo
Texas Instruments
LM27213MTD/NOPB TI-LM27213MTD/NOPB Datasheet
1Mb / 32P
[Old version datasheet]   LM27213 Single Phase Hysteretic Buck Controller
logo
National Semiconductor ...
LM27213MTDX NSC-LM27213MTDX Datasheet
958Kb / 22P
   Single Phase Hysteretic Buck Controller
More results

Podobny opis - LM27212SQX

ProducentNumer częściArkusz danychSzczegółowy opis
logo
National Semiconductor ...
LM27213 NSC-LM27213 Datasheet
958Kb / 22P
   Single Phase Hysteretic Buck Controller
logo
Cherry Semiconductor Co...
CS-322 CHERRY-CS-322 Datasheet
801Kb / 4P
   Hysteretic Current-Mode Controller
logo
Texas Instruments
LM27213 TI-LM27213_15 Datasheet
1Mb / 32P
[Old version datasheet]   LM27213 Single Phase Hysteretic Buck Controller
LM3485 TI1-LM3485_14 Datasheet
1,023Kb / 22P
[Old version datasheet]   Hysteretic PFET Buck Controller
LM3475 TI1-LM3475_14 Datasheet
1Mb / 21P
[Old version datasheet]   Hysteretic PFET Buck Controller
logo
National Semiconductor ...
LM3485 NSC-LM3485 Datasheet
369Kb / 15P
   Hysteretic PFET Buck Controller
logo
Texas Instruments
LM3485 TI1-LM3485_16 Datasheet
1Mb / 28P
[Old version datasheet]   Hysteretic PFET Buck Controller
LM3485 TI-LM3485_15 Datasheet
1Mb / 24P
[Old version datasheet]   Hysteretic PFET Buck Controller
logo
National Semiconductor ...
LM3475 NSC-LM3475 Datasheet
305Kb / 14P
   Hysteretic PFET Buck Controller
logo
Texas Instruments
LM3485MMX TI-LM3485MMX Datasheet
996Kb / 23P
[Old version datasheet]   Hysteretic PFET Buck Controller
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


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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