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TPS61000 Datasheet(PDF) 15 Page - Texas Instruments

Part # TPS61000
Description  Single- and Dual-Cell Boost Converter
Download  25 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS61000 Datasheet(HTML) 15 Page - Texas Instruments

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O
O
FB
V
V
5
5
± 
 N
± 
V
500 mV
§
·
§
·
u
: u
¨
¸
¨
¸
©
¹
©
¹
VBAT
VOUT
LBO
5
10
3
R5
R3
R4
6
TPS61007
LBI
9
FB
COMP
2
CC1
100 pF
CC2
33 nF
RC
10 k
EN
R2
R1
1
GND
SW
7
4
Ci
10 µF
10 V
CO
22 µF
10 V
Low Battery
Warning
L1
33 µH
D1
FBGND
8
VO
Alkaline Cell
TPS61000, TPS61001, TPS61002, TPS61003
TPS61004, TPS61005, TPS61006, TPS61007
www.ti.com
SLVS279D – MARCH 2000 – REVISED AUGUST 2015
10.2 Typical Application
Figure 17. Typical Application Circuit for Adjustable Output Voltage Option
10.2.1 Design Requirements
See Table 2 for design parameters.
Table 2. TPS6100x Output Design Parameters
DESIGN PARAMETERS
VALUES
Input voltage range
1.8 V to 3.3 V
Output voltage
3.3 V
Output voltage ripple
±3% VOUT
10.2.2 Detailed Design Procedure
10.2.2.1 Programming the TPS61000 and TPS61007 Adjustable Output Voltage Devices
The output voltage of the TPS61000 and TPS61007 can be adjusted with an external resistor divider. The typical
value of the voltage on the FB pin is 500 mV in fixed-frequency operation and 485 mV in the power-save
operation mode. The maximum allowed value for the output voltage is 3.3 V. The current through the resistive
divider should be about 100 times greater than the current into the FB pin. The typical current into the FB pin is
0.01 µA, and the voltage across R4 is typically 500 mV. Based on those two values, the recommended value for
R4 is in the range of 500 k
Ω in order to set the divider current at 1 µA. From that, the value of resistor R3,
depending on the needed output voltage VOUT, can be calculated using the following equation:
(1)
If, as an example, an output voltage of 2.5 V is needed, a 2-M
Ω resistor should be chosen for R3.
The TPS61007 is an improved version of the TPS61000 adjustable output voltage device. The FBGND pin is
internally connected to GND.
Copyright © 2000–2015, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Links: TPS61000 TPS61001 TPS61002 TPS61003 TPS61004 TPS61005 TPS61006 TPS61007


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