TS3300DB [TOUCHSTONE]
A 0.6-4.5VIN, 1.8-5.25VOUT, 3.5A, Low Input Voltage, High-Efficiency Boost LDO; 一个0.6-4.5VIN ， 1.8-5.25VOUT ， 3.5A ，低输入电压，高效率升压LDO
| 型号： | TS3300DB |
| 厂家： | 
TOUCHSTONE SEMICONDUCTOR INC |
| 描述： | A 0.6-4.5VIN, 1.8-5.25VOUT, 3.5A, Low Input Voltage, High-Efficiency Boost LDO |
| 文件： | 总4页 (文件大小：451K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS3300 Demo Board
A 0.6-4.5VIN, 1.8-5.25VOUT, 3.5µA, Low Input Voltage, High-Efficiency Boost + LDO
FEATURES
DESCRIPTION
The demo board for the TS3300 is a completely
assembled and tested circuit board that can be used
for evaluating the TS3300. The TS3300 is a first
generation Touchstone Semi power management
Boost Regulator
Input Voltage: 0.6V- 4.5V
Output Voltage: 3V
Shutdown Control Jumper
Coilcraft 10µH Inductor (LPS4018-103ML)
Resistor Pad Available for Anti-CrushTM
Voltage Setting
product that combines
a
high-efficiency boost
regulator and a low dropout linear regulator (LDO) in
one package. The TS3300 LDO’s input is connected
to the output of the boost regulator, serving as a post-
regulator for the boost.
LDO
Output Voltage: 1.8V
Shutdown Control Jumper
Switch/FET Enable Jumper
The TS3300 includes an anti-crushTM feature to
prevent the collapse of the input voltage to the boost
regulator when the input is a weak (high impedance)
source. If the input voltage drops below a pre-
determined voltage threshold (settable by a resistor
divider), the boost regulator switching cycles are
paused, effectively limiting the minimum input
voltage. A pull-down resistor pad is available in order
to set the anti-crushTM voltage.
COMPONENT LIST
DESIGNATION
L1
QTY DESCRIPTION
1
2
3
1
2
2
1
10µH ±20% Shielded Inductor
(4mmx4mm), LPS4018-103ML
22µF ±10% capacitor (1206),
445-8035-6-ND
3.3nF ±10% capacitor (0603),
445-5084-2-ND
C1, C4
C2, C3, C7
C5
The TS3300 boost regulator is set to an output
voltage of 3V while the LDO is set to an output
voltage of 1.8V via a resistor divider circuit. The boost
regulator and the LDO can be shutdown separately
via a jumper. The LDO switch/FET can be fully
enhanced via a jumper. The TS3300 is fully specified
over the -40°C to +85°C temperature range and is
available in a low-profile, thermally-enhanced 16-pin
3x3mm TQFN package with an exposed back-side
paddle.
10µF ±10% capacitor (0805),
445-1371-2-ND
R1, R6
R3, R4
R5
1.37MΩ ± 1% (0805),
311-1.37MCRTR-ND
6.81MΩ ± 1% (0805),
311-6.81MCRTR-ND
2.61MΩ ± 1% (0805),
541-2.61MCTR-ND
TS3300
U1
1
5
BOOST,BOOST_OUT,
REG_OUT, GND (2)
J1, J2, J3
Test points
3
Jumper
Product datasheet and additional documentation can
be
found
on
the
factory web
site
at
www.touchstonesemi.com.
ORDERING INFORMATION
Order Number
Description
TS3300
Demo Board
TS3300DB
Figure 1. TS3300 Demo Board (Top View)
Figure 2. TS3300 Demo Board (Bottom View)
Page 1
© 2013 Touchstone Semiconductor, Inc. All rights reserved.
TS3300 Demo Board
FB) pin is 505mV. It is recommended to use large
resistor values to minimize additional current draw at
the output. Resistors values less than 8MΩ are
recommended. Boost output voltage can be set by
solving for R3 for a given R6 value in the following
equation:
DESCRIPTION
The TS3300 boost regulator is set to an output
voltage of 3V while the LDO is set to an output
voltage of 1.8V via a resistor divider circuit. The boost
regulator and the LDO can be shutdown separately
via J1 and the combination of J2 and J3, respectively.
The LDO switch/FET can be fully enhanced via the
combination of J2 and J3. Refer to Table 1 and Table
2. The complete demo board circuit is shown in
Figure 6.
ꢀ
ꢂꢃO ꢄ 0.505 ꢀ6
ꢀ3ꢁ
0.505
To set a 3V output voltage with R6 = 1.37MΩ, R3 is
calculated to be 6.77MΩ. A 1% standard resistor
value of 6.81MΩ is selected. This results in an output
voltage of 3.02V.
Resistor R1 in combination with R2 create a voltage
divider circuit that sets the desired anti-crushTM
voltage. The demo board does not include R2. Refer
to the TS3300 product datasheet “Applications
Information” section for more details.
LDO OUTPUT VOLTAGE SETTING
The LDO output voltage can be set independently of
the boost, via a voltage divider circuit as shown in
Figure 4.
SW EN
REG EN
Jumper Jumper
CONDITION
FUNCTION
J2
J3
REG FB
connected to
R4, R5
LDO Normal
Operation
REG FB
connected to BO
low
high
LDO
Shutdown
pin
(See “Quick Start
Procedure”, step 6)
Figure 4: Setting the LDO Output Voltage
with a Voltage Divider
Internal FET
Hard-on
high
low
Table 1. LDO REG EN(J3) and SW EN(J2)Settings
The output feedback (REG FB) pin is 505mV. It is
recommended to use large resistor values to
minimize additional current drawn from the output.
The LDO output voltage can be set by solving for R4
for a given R5 value in the following equation:
ꢁꢁꢁꢁꢁꢁꢁ
ꢀꢁ
Jumper
J1
FUNCTION
ꢀ
ꢂꢀꢆꢇOꢈT ꢄ 0.505 ꢀ5
low
Boost Enabled
ꢀꢅꢁ
0.505
high
Boost Shutdown
Table 2. Boost Regulator Shutdown/Enable Settings
To set a 1.8V output voltage with R4 = 2.61MΩ, R4 is
calculated to be 6.69MΩ. A 1% standard resistor
value of 6.81MΩ is selected. This results in an output
voltage of 1.82V.
BOOST REGULATOR OUTPUT VOLTAGE
SETTING
ANTI-CRUSHTM VOLTAGE SETTING
The output voltage can be set via a voltage divider
circuit as shown in Figure 3. The output feedback (BO
To set the anti-crushTM voltage, a feedback pin (BI
FB) in conjunction with a voltage divider circuit can be
implemented as shown in Figure 5. The feedback pin
voltage is 392mV. It is recommended to use large
resistor values to minimize additional current draw at
the input.
Figure 3: Setting the Boost Output Voltage
with a Voltage Divider
TS3300DB r1p0
Page 2
RTFDS
TS3300 Demo Board
To evaluate the TS3300 the following steps are to be
performed:
1) Connect the battery positive terminal to the test
point labeled BOOST. Connect the negative
terminal of the battery to the test point labeled
GND.
Figure 5: Setting the Anti-CrushTM Voltage
2) To monitor the boost regulator output voltage,
connect the positive terminal of the voltmeter to
the test point labeled BOOST_OUT. Connect the
negative terminal of the voltmeter to the test point
labeled GND. The output voltage should be
approximately 3.02V.
with a Voltage Divider
Using the following equation to solve for R1 for a
given R2 value, the output voltage can be set:
ꢂꢂꢉꢊTIꢄꢋꢀꢈSꢌ ꢄ 0.3ꢍ2ꢃꢀ2
TM
ꢀ1ꢁ
3) To monitor the LDO output voltage, connect the
positive terminal of the voltmeter to the test point
labeled BOOST_OUT. Connect the negative
terminal of the voltmeter to the test point labeled
0.3ꢍ2
To set a 0.8V output voltage with R2 = 1.37MΩ, R1 is
calculated to be 1.42MΩ. A 1% standard resistor
value of 1.37MΩ is selected. This results in an anti-
crush voltage of 784mV. The anti-crushTM voltage is
to be set above the minimum input voltage
specification of the TS3300. Refer to the TS3300
product datasheet “ꢉpplications Information” section
for more details.
GND.
The
output
voltage
should
be
approximately 1.82V.
ꢁꢁꢁꢁꢁꢁ
4) To shutdown the boost regulator only, set ꢃꢆꢊ
to a high state via jumper J1. The output will drop
to approximately 1.16V.
5) To enable the LDO internal switch/FET, set SW
EN to a high state and REG EN to a low state via
jumper J2 and J3, respectively. The LDO output
voltage should be equal to the boost output
voltage.
QUICK START PROCEDURE
Required Equipment
TS3300 Demo Board
6) To shutdown the LDO only, remove the battery.
Then, remove resistor R5. Solder one side of a
wire to the bottom side of capacitor C7. Now
solder the other side of the wire to the
BOOST_OUT test point. The LDO output voltage
should be approximately 0V.
1.2V Battery
Two Digital Multimeters
Solder Iron ( for LDO shutdown only)
Figure 6. TS3300 Demo Board Circuit
TS3300DB r1p0
Page 3
RTFDS
TS3300 Demo Board
Figure 7. Top Layer View #1
Figure 8. Top Layer View #2
Figure 10. Bottom Layer (GND) #2
Figure 9. Bottom Layer (GND) #1
Page 4 Touchstone Semiconductor, Inc.
TS3300DB r1p0
630 Alder Drive, Milpitas, CA 95035
+1 (408) 215 - 1220 ▪ www.touchstonesemi.com
RTFDS
相关型号：
TS3300ITQ1633T
0.6-4.5VIN, 1.8-5.25VOUT, 3.5-uA, Low Input Voltage, High-Efficiency Boost LDO
TOUCHSTONE
TS3300ITQ1633TP
0.6-4.5VIN, 1.8-5.25VOUT, 3.5-uA, Low Input Voltage, High-Efficiency Boost LDO
TOUCHSTONE
©2020 ICPDF网 联系我们和版权申明