поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

CXLD140 датащи(PDF) 6 Page - Maxim Integrated Products

номер детали CXLD140
подробное описание детали  16μA IQ,, 1.2A PWM Step-Down DC-DC Converters
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  MAXIM [Maxim Integrated Products]
домашняя страница  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

CXLD140 датащи(HTML) 6 Page - Maxim Integrated Products

Back Button CXLD140 Datasheet HTML 2Page - Maxim Integrated Products CXLD140 Datasheet HTML 3Page - Maxim Integrated Products CXLD140 Datasheet HTML 4Page - Maxim Integrated Products CXLD140 Datasheet HTML 5Page - Maxim Integrated Products CXLD140 Datasheet HTML 6Page - Maxim Integrated Products CXLD140 Datasheet HTML 7Page - Maxim Integrated Products CXLD140 Datasheet HTML 8Page - Maxim Integrated Products CXLD140 Datasheet HTML 9Page - Maxim Integrated Products CXLD140 Datasheet HTML 10Page - Maxim Integrated Products Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 12 page
background image
16µA IQ, 1.2A PWM DC-DC
Step-Down Converters
6
_______________________________________________________________________________________
Detailed Description
The MAX1556/MAX1557 synchronous step-down con-
verters deliver a guaranteed 1.2A/600mA at output volt-
ages from 0.75V to VIN. They use a 1MHz PWM
current-mode control scheme with internal compensation,
allowing for tiny external components and a fast transient
response. At light loads the MAX1556/MAX1557 automat-
ically switch to pulse-skipping mode to keep the quies-
cent supply current as low as 16µA. Figures 2 and 3
show the typical application circuits.
Control Scheme
During PWM operation the converters use a fixed-fre-
quency, current-mode control scheme. The heart of the
current-mode PWM controller is an open-loop, multiple-
input comparator that compares the error-amp voltage
feedback signal against the sum of the amplified cur-
rent-sense signal and the slope-compensation ramp. At
the beginning of each clock cycle, the internal high-side
p-channel MOSFET turns on until the PWM comparator
trips. During this time the current in the inductor ramps
up, sourcing current to the output and storing energy in
the inductor’s magnetic field. When the p-channel turns
off, the internal low-side n-channel MOSFET turns on.
Now the inductor releases the stored energy while the
current ramps down, still providing current to the output.
The output capacitor stores charge when the inductor
current exceeds the load and discharges when the
inductor current is lower than the load. Under overload
conditions, when the inductor current exceeds the cur-
rent limit, the high-side MOSFET is turned off and the
low-side MOSFET remains on until the next clock cycle.
Pin Description
PIN
NAME
FUNCTION
1
IN
Supply Voltage Input. Connect to a 2.6V to 5.5V source.
2
GND
Ground. Connect to PGND.
3SS
Soft-Start Control. Connect a 1000pF capacitor (CSS) from SS to GND to eliminate input-current
overshoot during startup. CSS is required for normal operation of the MAX1556/MAX1557. For greater
than 22µF total output capacitance, increase CSS to COUT / 22,000 for soft-start. SS is internally
discharged through 200
Ω to GND in shutdown.
4
OUT
Output Sense Input. Connect to the output of the regulator. D1 and D2 select the desired output
voltage through an internal feedback resistor-divider. The internal feedback resistor-divider remains
connected in shutdown.
5
SHDN
Shutdown Input. Drive SHDN low to enable low-power shutdown mode. Drive high or connect to IN
for normal operation.
6
D2
OUT Voltage-Select Input. See Table 1.
7
PGND
Power Ground. Connect to GND.
8LX
Inductor Connection. Connected to the drains of the internal power MOSFETs. High impedance in
shutdown mode.
9
INP
Supply Voltage, High-Current Input. Connect to a 2.6V to 5.5V source. Bypass with a 10µF ceramic
capacitor to PGND.
10
D1
OUT Voltage-Select Input. See Table 1.
—EP
Exposed Paddle. Connect to ground plane. EP also functions as a heatsink. Solder to circuit-board
ground plane to maximize thermal dissipation.
D1
D2
MAX1556
VOUT
MAX1556A
VOUT
MAX1557
VOUT
00
Adjustable
(VFB = 0.75)
from 0.75V to
VIN
3.3V
Adjustable
(VFB = 0.75)
from 0.75V to
VIN
0
1
3.3V
1.5V
1.5V
1
0
2.5V
1.2V
1.3V
1
1
1.8V
2.5V
1.0V
Table 1. Output-Voltage-Select Truth Table
A zero represents D_ being driven low or connected to GND.
A 1 represents D_ being driven high or connected to IN.


Аналогичный номер детали - CXLD140

производительномер деталидатащиподробное описание детали
logo
Willow Technologies Ltd
CXL-GP WILLOW-CXL-GP Datasheet
435Kb / 2P
   Small, Low-Cost
logo
List of Unclassifed Man...
CXL02TG3 ETC2-CXL02TG3 Datasheet
391Kb / 2P
   HIGH PERFORMANCE ACCELEROMETER
logo
Willow Technologies Ltd
CXL02TG3 WILLOW-CXL02TG3 Datasheet
391Kb / 2P
   High Stability
logo
List of Unclassifed Man...
CXL04GP1 ETC2-CXL04GP1 Datasheet
435Kb / 2P
   High Performance, 1-Axis and 3-Axis Accelerometers
logo
Willow Technologies Ltd
CXL04GP1 WILLOW-CXL04GP1 Datasheet
435Kb / 2P
   High Performance, 1-Axis and 3-Axis Accelerometers
More results

Аналогичное описание - CXLD140

производительномер деталидатащиподробное описание детали
logo
Maxim Integrated Produc...
MAX1556 MAXIM-MAX1556_11 Datasheet
737Kb / 12P
   16μA IQ, 1.2A PWM Step-Down DC-DC Converters
Rev 3; 1/11
MAX1556 MAXIM-MAX1556_1 Datasheet
718Kb / 12P
   16關A IQ, 1.2A PWM Step-Down DC-DC Converters
Rev 0; 7/04
logo
Torex Semiconductor
XC6375 TOREX-XC6375 Datasheet
34Kb / 4P
   PWM Controlled, Step down DC/DC Converters
XC9201 TOREX-XC9201 Datasheet
341Kb / 20P
   PWM Controlled Step-Down DC/DC Converters
logo
SHANGHAI BELLING CO., L...
BL8516 BELLING-BL8516 Datasheet
456Kb / 7P
   1.2A Step-down DC-DC Converter
logo
Torex Semiconductor
XC6365 TOREX-XC6365_2 Datasheet
1Mb / 24P
   PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Converters
XC6376 TOREX-XC6376 Datasheet
306Kb / 17P
   PWM Controlled PWM/PFM Switchable Step-down DC/DC Converters
logo
Will Semiconductor Ltd.
WD1015 WILLSEMI-WD1015 Datasheet
1Mb / 11P
   1.5MHz, 1.2A, Step-down DC-DC Converter
logo
Maxim Integrated Produc...
MAX748A MAXIM-MAX748A Datasheet
135Kb / 12P
   3.3V, Step-Down, Current-Mode PWM DC-DC Converters
Rev 0; 9/93
logo
STMicroelectronics
ST763A STMICROELECTRONICS-ST763A Datasheet
252Kb / 10P
   3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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