參數(shù)資料
型號： TPS61059DRCTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.8 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, GREEN, PLASTIC, SON-10
文件頁數(shù)： 1/29頁
文件大?。?/td> 1771K
代理商： TPS61059DRCTG4
(3,25 mm x 3,25 mm)
www.ti.com
FEATURES
DESCRIPTION
APPLICATIONS
C IN
L1
VIN
22
F
4.7
H
2.7 V . . 5.5 V
GND
TPS61058
GND
PVIN
EN
VIN
SW
VOUT
FB
PGND
C1, C2, C3
x3
D1
C3
Rs
R2
R1
IOK
R3
R4
FLASH ON (0/1.8 V)
22
F
39 k
22 k
56 k
1.5
62 k
1 nF
(COG)
R5
5.6 k
0
10
20
30
40
50
60
70
80
90
100
2.70 3.10
3.50 3.90
4.30
4.70
5.10
5.50
V - Input Voltage - V
I
LED
Power
Efficiency
(P
/P
)-
%
L
ED
IN
I
= 500 mA @ V = 3.7 V
LED
F
TPS61058
TPS61059
SLVS572B – APRIL 2005 – REVISED DECEMBER 2005
SYNCHRONOUS BOOST CONVERTER WITH DOWN MODE
HIGH POWER WHITE LED DRIVER
80% Efficient Synchronous Boost Converter
The
TPS61058/9
devices
are
fixed
frequency,
synchronous
boost
dc-dc
converters
with
an
– 500-mA LED Current From 3.3-V Input
integrated down conversion mode. The devices are
(TPS61058)
optimized for driving high power single cell white
– 800-mA LED Current From 3.3-V Input
LEDs up to 800 mA from a 2.7-V to 5.5-V input. The
(TPS61059)
LED current can be programmed to different levels
Input Voltage Range: 2.7 V to 5.5 V
(e.g. torch, flashlight) by a set of external resistors.
Fixed Frequency 650 kHz (Typ) Operation
The boost converter is based on a 650 kHz fixed
LED Disconnect During Shutdown
frequency, pulse-width-modulation (PWM) controller
using a synchronous rectifier to obtain maximum
Open/Shorted LED Protection
efficiency. The maximum peak current in the boost
Over-Temperature Protection
switch is limited to 1000 mA (TPS61058) and 1500
Low Shutdown Current: 100 nA (Typ)
mA (TPS61059).
Total Solution Of Less Than 80 mm2
The converter can be disabled to maximize battery
Small 3mm x 3mm QFN-10 Package
life. In the shutdown mode, the load is completely
disconnected and the current consumption is reduced
to less than 1 A. Built-in precharge and soft-start
circuitry prevents excessive inrush current during
Torch/Camera White LED Supply for Cell
start-up.
Phones, Smart-Phones and PDAs
The
device
is
packaged
in
a
10-pin
QFN
PowerPAD package measuring 3 mm x 3 mm
(DRC).
Figure 1. 500 mA Flashlight Application
Figure 2. Flashlight Efficiency vs VIN
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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