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부품번호 | 10TPB100M 기능 |
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기능 | N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 22 페이지수
June 2003
LM2727/LM2737
N-Channel FET Synchronous Buck Regulator Controller
for Low Output Voltages
General Description
The LM2727 and LM2737 are high-speed, synchronous,
switching regulator controllers. They are intended to control
currents of 0.7A to 20A with up to 95% conversion efficien-
cies. The LM2727 employs output over-voltage and under-
voltage latch-off. For applications where latch-off is not de-
sired, the LM2737 can be used. Power up and down
sequencing is achieved with the power-good flag, adjustable
soft-start and output enable features. The LM2737 and
LM2737 operate from a low-current 5V bias and can convert
from a 2.2V to 16V power rail. Both parts utilize a fixed-
frequency, voltage-mode, PWM control architecture and the
switching frequency is adjustable from 50kHz to 2MHz by
adjusting the value of an external resistor. Current limit is
achieved by monitoring the voltage drop across the on-
resistance of the low-side MOSFET, which enhances low
duty-cycle operation. The wide range of operating frequen-
cies gives the power supply designer the flexibility to fine-
tune component size, cost, noise and efficiency. The adap-
tive, non-overlapping MOSFET gate-drivers and high-side
bootstrap structure helps to further maximize efficiency. The
high-side power FET drain voltage can be from 2.2V to 16V
and the output voltage is adjustable down to 0.6V.
Features
n Input power from 2.2V to 16V
n Output voltage adjustable down to 0.6V
n Power Good flag, adjustable soft-start and output enable
for easy power sequencing
n Output over-voltage and under-voltage latch-off
(LM2727)
n Output over-voltage and under-voltage flag (LM2737)
n Reference Accuracy: 1.5% (0˚C - 125˚C)
n Current limit without sense resistor
n Soft start
n Switching frequency from 50 kHz to 2 MHz
n TSSOP-14 package
Applications
n Cable Modems
n Set-Top Boxes/ Home Gateways
n DDR Core Power
n High-Efficiency Distributed Power
n Local Regulation of Core Power
Typical Application
© 2003 National Semiconductor Corporation DS200494
20049410
www.national.com
Electrical Characteristics (Continued)
VCC = 5V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ=+25˚C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design,
test, or statistical analysis.
Symbol
Parameter
Conditions
Min Typ Max Units
GATE DRIVE
IQ-BOOT BOOT Pin Quiescent Current
BOOTV = 12V, EN = 0
0˚C to +125˚C
-40˚C to +125˚C
95 160 µA
95 215
RDS1
Top FET Driver Pull-Up ON
resistance
BOOT-SW = 5V@350mA
3Ω
RDS2
Top FET Driver Pull-Down ON
resistance
BOOT-SW = 5V@350mA
2Ω
RDS3
Bottom FET Driver Pull-Up ON
BOOT-SW = 5V@350mA
resistance
3Ω
RDS4
Bottom FET Driver Pull-Down
ON resistance
BOOT-SW = 5V@350mA
2Ω
OSCILLATOR
fOSC
PWM Frequency
D Max Duty Cycle
LOGIC INPUTS AND OUTPUTS
RFADJ = 590kΩ
RFADJ = 88.7kΩ
RFADJ = 42.2kΩ, 0˚C to +125˚C
RFADJ = 42.2kΩ, -40˚C to +125˚C
RFADJ = 17.4kΩ
RFADJ = 11.3kΩ
fPWM = 300kHz
fPWM = 600kHz
50
300
500 600 700
490 600 700
1400
2000
90
88
kHz
%
VSD-IH
VSD-IL
SD Pin Logic High Trip Point
SD Pin Logic Low Trip Point
0˚C to +125˚C
-40˚C to +125˚C
1.3
1.25
2.6
1.6
1.6
3.5
V
V
VPWGD-TH-LO PWGD Pin Trip Points
FB Voltage Going Down
0˚C to +125˚C
-40˚C to +125˚C
0.413
0.410
0.430
0.430
0.446
0.446
V
VPWGD-TH-HI PWGD Pin Trip Points
FB Voltage Going Up
0˚C to +125˚C
-40˚C to +125˚C
0.691
0.688
0.710
0.710
0.734
0.734
V
VPWGD-HYS PWGD Hysteresis (LM2737 only) FB Voltage Going Down FB Voltage 35 mV
Going Up
110
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device
operates correctly. Opearting Ratings do not imply guaranteed performance limits.
Note 2: The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
www.national.com
4
4페이지 Typical Performance Characteristics (Continued)
Start-Up (Full-Load)
VIN = 10V, VO = 1.2V
IO = 10A, CSS = 10nF
FSW = 300kHz
Start Up (No-Load, 10x CSS)
VIN = 10V, VO = 1.2V
CSS = 100nF, FSW = 300kHz
20049422
Start Up (Full Load, 10x CSS)
VIN = 10V, VO = 1.2V
IO = 10A, CSS = 100nF
FSW = 300kHz
Shutdown
VIN = 10V, VO = 1.2V
IO = 10A, CSS = 10nF
FSW = 300kHz
20049426
20049425
Start Up (Full Load, 10x CSS)
VIN = 10V, VO = 1.2V
IO = 10A, CSS = 100nF
FSW = 300kHz
20049427
Load Transient Response (IO = 0 to 4A)
VIN = 12V, VO = 1.2V
FSW = 300kHz
20049433
7
20049428
www.national.com
7페이지 | |||
구 성 | 총 22 페이지수 | ||
다운로드 | [ 10TPB100M.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
10TPB100M | N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages | National Semiconductor |
10TPB100M | Surface Mount | Sanyo |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |