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LM2736XMKX PDF даташит

Спецификация LM2736XMKX изготовлена ​​​​«National Semiconductor» и имеет функцию, называемую «Thin SOT23 750mA Load Step-Down DC-DC Regulator».

Детали детали

Номер произв LM2736XMKX
Описание Thin SOT23 750mA Load Step-Down DC-DC Regulator
Производители National Semiconductor
логотип National Semiconductor логотип 

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LM2736XMKX Даташит, Описание, Даташиты
October 2004
LM2736
Thin SOT23 750mA Load Step-Down DC-DC Regulator
General Description
The LM2736 regulator is a monolithic, high frequency, PWM
step-down DC/DC converter in a 6-pin Thin SOT23 package.
It provides all the active functions to provide local DC/DC
conversion with fast transient response and accurate regu-
lation in the smallest possible PCB area.
With a minimum of external components and online design
support through WEBENCH, the LM2736 is easy to use.
The ability to drive 750mA loads with an internal 350m
NMOS switch using state-of-the-art 0.5µm BiCMOS technol-
ogy results in the best power density available. The world
class control circuitry allows for on-times as low as 13ns,
thus supporting exceptionally high frequency conversion
over the entire 3V to 18V input operating range down to the
minimum output voltage of 1.25V. Switching frequency is
internally set to 550kHz (LM2736Y) or 1.6MHz (LM2736X),
allowing the use of extremely small surface mount inductors
and chip capacitors. Even though the operating frequencies
are very high, efficiencies up to 90% are easy to achieve.
External shutdown is included, featuring an ultra-low
stand-by current of 30nA. The LM2736 utilizes current-mode
control and internal compensation to provide high-
performance regulation over a wide range of operating con-
ditions. Additional features include internal soft-start circuitry
to reduce inrush current, pulse-by-pulse current limit, ther-
mal shutdown, and output over-voltage protection.
Features
n Thin SOT23-6 package
n 3.0V to 18V input voltage range
n 1.25V to 16V output voltage range
n 750mA output current
n 550kHz (LM2736Y) and 1.6MHz (LM2736X)
switching frequencies
n 350mNMOS switch
n 30nA shutdown current
n 1.25V, 2% internal voltage reference
n Internal soft-start
n Current-Mode, PWM operation
n WEBENCH online design tool
Applications
n Local Point of Load Regulation
n Core Power in HDDs
n Set-Top Boxes
n Battery Powered Devices
n USB Powered Devices
n DSL Modems
n Notebook Computers
Typical Application Circuit
Efficiency vs Load Current "X"
VIN = 5V, VOUT = 3.3V
20124201
WEBENCHis a trademark of Transim.
© 2004 National Semiconductor Corporation DS201242
20124251
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LM2736XMKX Даташит, Описание, Даташиты
Connection Diagram
20124205
6-Lead TSOT
NS Package Number MK06A
Ordering Information
Order Number Package Type NSC Package Drawing
LM2736XMK
LM2736YMK
LM2736XMKX
TSOT-6
MK06A
LM2736YMKX
* Contact the local sales office for the lead-free package.
Package Marking
SHAB
SHBB
SHAB
SHBB
Supplied As
1000 Units on Tape and Reel
1000 Units on Tape and Reel
3000 Units on Tape and Reel
3000 Units on Tape and Reel
Pin Description
Pin Name
Function
1
BOOST
Boost voltage that drives the internal NMOS control switch. A
bootstrap capacitor is connected between the BOOST and SW
pins.
2
GND
Signal and Power ground pin. Place the bottom resistor of the
feedback network as close as possible to this pin for accurate
regulation.
3 FB Feedback pin. Connect FB to the external resistor divider to set
output voltage.
4 EN Enable control input. Logic high enables operation. Do not allow
this pin to float or be greater than VIN + 0.3V.
5 VIN Input supply voltage. Connect a bypass capacitor to this pin.
6 SW Output switch. Connects to the inductor, catch diode, and
bootstrap capacitor.
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LM2736XMKX Даташит, Описание, Даташиты
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN
SW Voltage
Boost Voltage
Boost to SW Voltage
FB Voltage
EN Voltage
Junction Temperature
ESD Susceptibility (Note 2)
Storage Temp. Range
-0.5V to 22V
-0.5V to 22V
-0.5V to 28V
-0.5V to 6.0V
-0.5V to 3.0V
-0.5V to (VIN + 0.3V)
150˚C
2kV
-65˚C to 150˚C
Soldering Information
Infrared/Convection Reflow (15sec)
Wave Soldering Lead Temp. (10sec)
220˚C
260˚C
Operating Ratings (Note 1)
VIN
SW Voltage
Boost Voltage
Boost to SW Voltage
Junction Temperature Range
Thermal Resistance θJA (Note 3)
3V to 18V
-0.5V to 18V
-0.5V to 23V
1.6V to 5.5V
−40˚C to +125˚C
118˚C/W
Electrical Characteristics
Specifications with standard typeface are for TJ = 25˚C, and those in boldface type apply over the full Operating Tempera-
ture Range (TJ = -40˚C to 125˚C). VIN = 5V, VBOOST - VSW = 5V unless otherwise specified. Datasheet min/max specification
limits are guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Units
VFB
VFB/VIN
Feedback Voltage
Feedback Voltage Line
Regulation
VIN = 3V to 18V
1.225
1.250
0.01
1.275
V
%/V
IFB
UVLO
Feedback Input Bias Current
Undervoltage Lockout
Undervoltage Lockout
UVLO Hysteresis
Sink/Source
VIN Rising
VIN Falling
2.0
0.30
10
2.74
2.3
0.44
250
2.90
0.62
nA
V
FSW Switching Frequency
LM2736X
LM2736Y
1.2
0.40
1.6
0.55
1.9
0.66
MHz
DMAX Maximum Duty Cycle
LM2736X
LM2736Y
85 92
90 96
%
DMIN Minimum Duty Cycle
LM2736X
LM2736Y
2
%
1
RDS(ON)
ICL
IQ
Switch ON Resistance
Switch Current Limit
Quiescent Current
Quiescent Current (shutdown)
IBOOST Boost Pin Current
VBOOST - VSW = 3V
VBOOST - VSW = 3V
Switching
VEN = 0V
LM2736X (50% Duty Cycle)
LM2736Y (50% Duty Cycle)
1.0
350 650 m
1.5 2.3 A
1.5 2.5 mA
30 nA
2.2 3.3
mA
0.9 1.6
VEN_TH
IEN
ISW
Shutdown Threshold Voltage
Enable Threshold Voltage
Enable Pin Current
Switch Leakage
VEN Falling
VEN Rising
Sink/Source
0.4
V
1.8
10 nA
40 nA
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see Electrical Characteristics.
Note 2: Human body model, 1.5kin series with 100pF.
Note 3: Thermal shutdown will occur if the junction temperature exceeds 165˚C. The maximum power dissipation is a function of TJ(MAX) , θJA and TA . The
maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) – TA)/θJA . All numbers apply for packages soldered directly onto a 3” x 3” PC
board with 2oz. copper on 4 layers in still air. For a 2 layer board using 1 oz. copper in still air, θJA = 204˚C/W.
Note 4: Guaranteed to National’s Average Outgoing Quality Level (AOQL).
Note 5: Typicals represent the most likely parametric norm.
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Номер в каталогеОписаниеПроизводители
LM2736XMKThin SOT23 750mA Load Step-Down DC-DC RegulatorNational Semiconductor
National Semiconductor
LM2736XMKXThin SOT23 750mA Load Step-Down DC-DC RegulatorNational Semiconductor
National Semiconductor

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