參數(shù)資料
型號: L6997D
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, PDSO20
封裝: MO-153AC, TSSOP-20
文件頁數(shù): 1/30頁
文件大?。?/td> 591K
代理商: L6997D
1/30
L6997
May 2004
1
FEATURES
FROM 3V TO 5.5V VCC RANGE
MINIMUM OUTPUT VOLTAGE AS LOW AS
0.6V
1V TO 28V INPUT VOLTAGE RANGE
CONSTANT ON TIME TOPOLOGY
VERY FAST LOAD TRANSIENTS
0.6V, ±1% VREF
SELECTABLE SINKING MODE
LOSSLESS CURRENT LIMIT, AVAILABLE
ALSO IN SINKING MODE
REMOTE SENSING
OVP,UVP LATCHED PROTECTIONS
600
A TYP QUIESCENT CURRENT
POWER GOOD AND OVP SIGNALS
PULSE SKIPPING AT LIGTH LOADS
94% EFFICIENCY FROM 3.3V TO 2.5V
2
APPLICATIONS
NETWORKING
DC/DC MODULES
DISTRIBUTED POWER
MOBILE APPLICATIONS
CHIP SET, CPU, DSP AND MEMORIES
SUPPLY
3
DESCRIPTION
The device is a high efficient solution for networking
dc/dc modules and mobile applications compatible
with 3.3V bus and 5V bus.
It's able to regulate an output voltage as low as 0.6V.
The constant on time topology assures fast load tran-
sient response. The embedded voltage feed-forward
provides nearly constant switching frequency opera-
tion in spite of a wide input voltage range.
An integrator can be introduced in the control loop to
reduce the static output voltage error.
The remote sensing improves the static and dynamic
regulation, recovering the wires voltage drop.
Pulse skipping technique reduces power consump-
tion at light loads. Drivers current capability allows
output currents in excess of 20A.
STEP DOWN CONTROLLER
FOR LOW VOLTAGE OPERATIONS
Figure 2. Minimum Component Count Application
L6997
SHDN
3.3V
INT
VDR
VSENSE
OVP
Vref
GND
GNDSENSE
VFB
VCC
SS
OSC
0.6V
PGOOD
PGND
LGATE
PHASE
HGATE
ILIM
BOOT
Rilim
Css
Cvref
HS
LS
Rin1
Rin2
Cin
Cboot
Dboot
L
Cout
Ro1
Ro2
DS
REV. 4
Figure 1. Package
Table 1. Order Codes
Part Number
Package
L6997D
TSSOP20
L6997DTR
Tape & Reel
TSSOP20
Obsolete
Product(s)
- Obsolete
Product(s)
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相關代理商/技術參數(shù)
參數(shù)描述
L6997DTR 功能描述:DC/DC 開關控制器 Adjustable Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
L6997S 功能描述:DC/DC 開關控制器 STEP DOWN CONTROLLER Lo Vltg Operations RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
L6997STR 功能描述:DC/DC 開關控制器 3.0 to 5.5V Step-Dwn RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
L6998-0 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6998-1 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT