參數(shù)資料
型號(hào): TPS60110PWP
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 0.3 A SWITCHED CAPACITOR REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO20
封裝: GREEN, PLASTIC, HTSSOP-20
文件頁(yè)數(shù): 6/25頁(yè)
文件大?。?/td> 678K
代理商: TPS60110PWP
TPS60110
REGULATED 5V 300mA LOW NOISE
CHARGE PUMP DC/DC CONVERTER
SLVS215C JUNE 1999 REVISED AUGUST 2008
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
capacitor selection
The TPS60110 requires only four external capacitors as shown in the basic application circuit. Their values are
closely linked to the output current capacity, output noise requirements, and mode of operation. Generally, the
transfer capacitors (CxF) is the smallest.
The input capacitor improves system efficiency by reducing the input impedance and stabilizes the input current.
CIN is recommended to be about two to four times as large as CxF.
The output capacitor (CO) can be selected from 8-times to 50-times larger than CxF, depending on the mode
of operation and ripple tolerance. Tables 3 and 4 show capacitor values recommended for low
quiescent-current operation (pulse-skip mode) and for low output voltage ripple operation (constant-frequency
mode). A recommendation is given for smallest size.
Table 3. Recommended Capacitor Values for Low Quiescent-Current Operation
(pulse-skip mode)
VIN
[V]
IO [mA]
CIN
[
F]
CxF
[
F]
CO
[
F]
OUTPUT
VOLTAGE
RIPPLE VPP
IN
[V]
IO [mA]
TANTALUM
CERAMIC
xF
[
F]
TANTALUM
CERAMIC
RIPPLE VPP
[mV]
3.6
225
15
2.2
33
145
3.6
225
4.7 + 10, (X5R)
2.2
22 + 10, (X5R)
55
3.6
300
15
2.2
33
135
3.6
300
4.7 + 10, (X5R)
2.2
22 + 10, (X5R)
75
All measurements are done with additional 1-F X7R ceramic capacitors at input and output.
Table 4. Recommended Capacitor Values for Low Output Voltage Ripple Operation
(constant-frequency mode)
VIN
[V]
IO
[mA]
CIN
[
F]
CxF
[
F]
CO
[
F]
OUTPUT
VOLTAGE
RIPPLE VPP
IN
[V]
O
[mA]
TANTALUM
CERAMIC
xF
[
F]
TANTALUM
CERAMIC
RIPPLE VPP
[mV]
3.6
225
15
2.2
33
17
3.6
225
4.7 + 10, (X5R)
2.2
22 + 10, (X5R)
6
3.6
300
15
2.2
33
22
3.6
300
4.7 + 10, (X5R)
2.2
22 + 10, (X5R)
8
All measurements are done with additional 1-F X7R ceramic capacitors at input and output.
In constant-frequency mode always select CO ≥ 33 F
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