LM3354-4.1EVAL National Semiconductor, LM3354-4.1EVAL Datasheet

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LM3354-4.1EVAL

Manufacturer Part Number
LM3354-4.1EVAL
Description
BOARD EVALUATION LM3354-4.1
Manufacturer
National Semiconductor
Datasheets

Specifications of LM3354-4.1EVAL

Main Purpose
DC/DC, Step Up or Down
Outputs And Type
1, Non-Isolated
Voltage - Output
4.1V
Current - Output
90mA
Voltage - Input
2.5 ~ 5.5V
Regulator Topology
Buck-Boost
Frequency - Switching
1MHz
Board Type
Fully Populated
Utilized Ic / Part
LM3354
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
© 2004 National Semiconductor Corporation
LM3354
Regulated 90mA Buck-Boost Switched Capacitor DC/DC
Converter
General Description
The LM3354 is a CMOS switched capacitor DC/DC con-
verter that produces a regulated output voltage by automati-
cally stepping up (boost) or stepping down (buck) the input
voltage. It accepts an input voltage between 2.5V and 5.5V.
The LM3354 is available with standard output voltages of
1.8V, 3.3V, 4.1V (ideal for white LED applications), and 5.0V.
If other output voltage options between 1.8V and 5.0V are
desired, please contact your National Semiconductor repre-
sentative.
The LM3354’s proprietary buck-boost architecture enables
up to 90mA of load current at an average efficiency greater
than 75%. Typical operating current is only 375 µA and the
typical shutdown current is only 2.3 µA.
The LM3354 is available in a 10-pin MSOP package. This
package has a maximum height of only 1.1 mm.
The high efficiency of the LM3354, low operating and shut-
down currents, small package size, and the small size of the
overall solution make this device ideal for battery powered,
portable, and hand-held applications.
See the LM3352 for up to 200mA of output current or the
LM3355 for up to 50mA of output current.
Typical Operating Circuit
DS200188
Features
n Regulated V
n Standard output voltages of 1.8V, 3.3V, 4.1V, and 5.0V
n Custom output voltages available from 1.8V to 5.0V in
n 2.5V to 5.5V input voltage range
n Up to 90mA (5.0V, 4.1V, and 1.8V options) or 70mA
n
n Uses few, low-cost external components
n Very small solution size
n 375 µA typical operating current
n 2.3 µA typical shutdown current
n 1 MHz typical switching frequency
n Architecture and control methods provide high load
n MSOP-10 package
n Over-temperature protection
Applications
n White LED display backlights
n 1-cell Lilon battery-operated equipment including PDAs,
n Flat panel displays
n Hand-held instruments
n Li-Ion, NiCd, NiMH, or alkaline battery powered systems
options) or
100 mV increments with volume order
(3.3V option) output current
current and good efficiency
hand-held PCs, cellular phones
>
75% average efficiency
±
OUT
4% (1.8V option) accuracy
with
±
20018801
3% (5.0V, 4.1V, and 3.3V
September 2002
www.national.com

Related parts for LM3354-4.1EVAL

LM3354-4.1EVAL Summary of contents

Page 1

... The LM3354 is available in a 10-pin MSOP package. This package has a maximum height of only 1.1 mm. The high efficiency of the LM3354, low operating and shut- down currents, small package size, and the small size of the overall solution make this device ideal for battery powered, portable, and hand-held applications ...

Page 2

... Connection Diagram Ordering Information Order Number LM3354MMX-5.0 MSOP-10 LM3354MM-5.0 MSOP-10 LM3354MMX-4.1 MSOP-10 LM3354MM-4.1 MSOP-10 LM3354MMX-3.3 MSOP-10 LM3354MM-3.3 MSOP-10 LM3354MMX-1.8 MSOP-10 LM3354MM-1.8 MSOP-10 Pin Description Pin Number www.national.com 20018802 Top View MSOP-10 Pin Package See NS Package Number MM Package Type NSC Package Drawing ...

Page 3

... IN < < LOAD mA < < 2.9V V 5.5V; IN < < LOAD mA Efficiency LOAD mA, V LOAD = 3.8V Output Voltage LOAD Ripple µF OUT (Peak-to-Peak) ceramic LM3354-4.1 < < Output Voltage (V 2.9V V 5.5V; IN < < OUT LOAD mA < < 2.5V V 5.5V; IN < < LOAD mA Efficiency LOAD LOAD Output Voltage LOAD ...

Page 4

... V 5.5V; IN < < LOAD mA Efficiency LOAD LOAD Output Voltage LOAD Ripple µF OUT (Peak-to-Peak) ceramic LM3354-ALL OUTPUT VOLTAGE VERSIONS Operating Quiescent Measured at Pin Current (Note 6) LOAD Shutdown Quiescent SD Pin at 0V (Note Current 7) Switching Frequency < < SD Input Threshold 2.5V V 5.5V IN Low < < SD Input Threshold 2 ...

Page 5

Typical Performance Characteristics V vs. V OUT IN V vs. V OUT IN V vs. V OUT IN Unless otherwise specified T 20018841 20018804 20018834 5 = 25˚ vs. V OUT IN 20018842 V vs. V OUT IN ...

Page 6

Typical Performance Characteristics V vs. V OUT IN Efficiency vs. V Efficiency vs. V www.national.com Unless otherwise specified T 20018836 IN 20018820 IN 20018839 6 = 25˚C. (Continued vs. V OUT IN 20018837 Efficiency vs 20018838 ...

Page 7

Typical Performance Characteristics Operating Quiescent Current vs Maximum V Ripple vs. C OUT Load Transient Response Unless otherwise specified T Switching Frequency vs. V 20018824 Maximum V OUT 20018832 20018814 7 = 25˚C. (Continued 20018823 Ripple ...

Page 8

... A 0.33 µF ceramic capacitor is suggested for C1 and C2. To ensure proper operation over temperature variations, an X7R dielectric material is recommended. Filter Capacitor Selection a) CAPACITOR TECHNOLOGIES The three major technologies of capacitors that can be used as filter capacitors for LM3354 are: i) tantalum, ii) ceramic and iii) polymer electrolytic technologies. through the comparator i) Tantalum is OUT Tantalum capacitors are widely used in switching regulators ...

Page 9

... A 1 µF, X7R ceramic capacitor should be connected to pin C . This capacitor provides the filtering needed for the FIL internal supply rail of the LM3354. Of the different capacitor technologies, a sample of vendors that have been verified as suitable for use with the LM3354 are shown in Table 2. ripple. OUT TABLE 2. Capacitor Vendor Information Tel ...

Page 10

... Maximum Load Under Start-Up Due to the LM3354’s unique start-up sequence not able to start up under all load conditions. Starting with less will allow the part to start correctly under any tempera- ture or input voltage conditions. After the output is in regu- lation, any load up to the maximum as specified in the Electrical Characteristics may be applied ...

Page 11

... Typical Application Circuits Driving Light Emitting Diodes The LM3354 can be used to drive LED’s of nearly any color. The 4.1V option is ideal for driving the White LED’s required for the backlight of small color displays. Figure 4 shows the circuit used to power White LED’s. The LED current is set by ...

Page 12

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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