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TPS61087-Q1 Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce TPS61087-Q1
Description  TPS61087-Q1 650-kHz or 1.2-MHz, 18.5-V Step-Up DC-DC Converter With 3.2-A Switch
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61087-Q1 Fiches technique(HTML) 5 Page - Texas Instruments

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V
=9V
OUT
V
=12V
OUT
V
=15V
OUT
V
=18.5V
OUT
V
-InputVoltage-V
IN
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
f =650kHz
S
V
-InputVoltage-V
IN
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.5
2.5
3.0
3.5
4.0
5.0
5.5
6.0
V
=9V
OUT
V
=15V
OUT
V
=18.5V
OUT
f =1.2Mhz
S
V
=12V
OUT
5
TPS61087-Q1
www.ti.com
SLVSB50B – DECEMBER 2011 – REVISED JUNE 2016
Product Folder Links: TPS61087-Q1
Submit Documentation Feedback
Copyright © 2011–2016, Texas Instruments Incorporated
Electrical Characteristics (continued)
VIN = 5 V, EN = VIN, VS = 15 V, TA = TJ = –40°C to 125°C, typical values are at TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
BOOST CONVERTER
VS
Boost output voltage
VIN + 0.5
18.5
V
VFB
Feedback regulation voltage
1.23
1.238
1.25
V
gm
Transconductance error amplifier
107
μA/V
IFB
Feedback input bias current
VFB = 1.238 V
0.1
μA
rDS(on)
N-channel MOSFET on-resistance
VIN = VGS = 5 V, ISW = current limit
0.13
0.18
VIN = VGS = 3 V, ISW = current limit
0.16
0.23
ISWLEAK
SW leakage current
EN = GND, VSW = VIN = 6 V
2
μA
ILIM
N-Channel MOSFET current limit
3.2
4
4.8
A
ISS
Soft-start current
VSS = 1.238 V
7
10
13
μA
fS
Oscillator frequency
FREQ = VIN
0.9
1.2
1.5
MHz
FREQ = GND
480
650
820
kHz
Line regulation
VIN = 2.5 V to 6 V, IOUT = 10 mA
0.0002
%/V
Load regulation
VIN = 5 V, IOUT = 1 mA to 1 A
0.11
%/A
6.6 Typical Characteristics
The typical characteristics are measured with the inductors 7447789003 3.3 µH (high frequency) or 74454068 6.8 µH (low
frequency) from Wurth and the rectifier diode SL22.
Table 1. Table of Graphs
FIGURE
IOUT(max)
Maximum load current
vs Input voltage at High frequency (1.2 MHz)
Figure 1
IOUT(max)
Maximum load current
vs Input voltage at Low frequency (650 kHz)
Figure 2
η
Efficiency
vs Load current, VS = 15 V, VIN = 5 V
Figure 3
vs Load current, VS = 9 V, VIN = 3.3 V
Figure 4
Supply current
vs Supply voltage
Figure 5
Oscillator frequency
vs Load current
Figure 6
Oscillator frequency
vs Supply voltage
Figure 7
Figure 1. Maximum Load Current vs Input Voltage
Figure 2. Maximum Load Current vs Input Voltage


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