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LTC3830ES8#TR

Description
IC reg ctrlr buck pwm VM 8-soic
CategoryPower/power management    The power supply circuit   
File Size263KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric View All

LTC3830ES8#TR Overview

IC reg ctrlr buck pwm VM 8-soic

LTC3830ES8#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP,
Contacts8
Manufacturer packaging codeS8
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage8 V
Minimum input voltage3 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9025 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.752 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency500 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9116 mm
LTC3830/LTC3830-1
High Power Step-Down
Synchronous DC/DC Controllers
for Low Voltage Operation
FEATURES
DESCRIPTIO
High Power Switching Regulator Controller
for 3.3V-5V to 1.xV-3.xV Step-Down Applications
No Current Sense Resistor Required
Low Input Supply Voltage Range: 3V to 8V
Maximum Duty Cycle > 91% Over Temperature
All N-Channel External MOSFETs
Excellent Output Regulation:
±1%
Over Line, Load
and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable or Fixed 3.3V Output (16-Pin Version)
Programmable Fixed Frequency Operation: 100kHz to
500kHz
External Clock Synchronization
Soft-Start (16-Pin Version and LTC3830-1)
Low Shutdown Current: <10µA
Overtemperature Protection
Available in S8, S16 and SSOP-16 Packages
The LTC
®
3830/LTC3830-1 are high power, high effi-
ciency switching regulator controllers optimized for
3.3V-5V to 1.xV-3.xV step-down applications. A preci-
sion internal reference and feedback system provide
±1%
output regulation over temperature, load current
and line voltage variations. The LTC3830/LTC3830-1 use
a synchronous switching architecture with N-channel
MOSFETs. Additionally, the chip senses output current
through the drain-source resistance of the upper
N-channel FET, providing an adjustable current limit
without a current sense resistor.
The LTC3830/LTC3830-1 operate with an input supply
voltage as low as 3V and with a maximum duty cycle of
>91% over temperature. They include a fixed frequency
PWM oscillator for low output ripple operation. The 200kHz
free-running clock frequency can be externally adjusted or
synchronized with an external signal from 100kHz to 500kHz.
In shutdown mode, the LTC3830 supply current drops to
<10µA. The LTC3830-1 differs from the LTC3830 S8 ver-
sion by replacing shutdown with a soft-start function.
For a similar, pin compatible DC/DC converter with an
output voltage as low as 0.6V, please refer to the LTC3832.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
CPU Power Supplies
Multiple Logic Supply Generator
Distributed Power Applications
High Efficiency Power Conversion
TYPICAL APPLICATIO
4.7µF
V
IN
3V TO 6V
5.1Ω
Efficiency and Power Loss vs Load Current
+
4.0
100
90
80
0.1µF
0.01µF
15k
220µF
10V
3.5
3.0
G1
COMP
0.1µF
GND PV
CC1
M1
Si7806DN
L
3.2µH
1.8V
9A
M2
Si7806DN
B320A
POWER LOSS (W)
LTC3830-1
PV
CC2
SS
MBR0520T1
2.5
2.0
1.5
1.0
0.5
0
0
1
2
12.7k 1%
FB
5.36k 1%
3.3nF
G2
+
C
OUT
270µF
2V
3830 F01
L: SUMIDA CDEP105-3R2MC-88
C
OUT
: PANASONIC EEFUEOD271R
Figure 1. High Efficiency 3V-6V to 1.8V Power Converter
U
EFFICIENCY (%)
70
60
50
40
30
V
IN
= 3.3V
V
OUT
= 1.8V
20
3 4 5 6 7 8 9 10
LOAD CURRENT (A)
3830 TA02
U
U
3830fa
1
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