Datasheet Linear Technology LT1930A — 数据表

制造商	Linear Technology
系列	LT1930A

ThinSOT中的1A，1.2MHz / 2.2MHz升压DC / DC转换器

数据表

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PDF, 201 Kb, 文件上传: Sep 3, 2017

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价格

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	LT1930AES5#PBF	LT1930AES5#TRMPBF	LT1930AES5#TRPBF
N	1	2	3
Package	SOT-23 包装外形图	SOT-23 包装外形图	SOT-23 包装外形图
Package Code	S5	S5	S5
Package Index	05-08-1635	05-08-1635	05-08-1635
Pin Count	5	5	5

参数化

Parameters / Models	LT1930AES5#PBF	LT1930AES5#TRMPBF	LT1930AES5#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC397A,DC634A,DC383B	DC397A,DC634A,DC383B	DC397A,DC634A,DC383B
Design Tools	LTspice File	LTspice File	LTspice File
Export Control	no	no	no
Frequency, kHz	2200	2200	2200
Integrated Inductor	no	no	no
Ishutdown, µA	0.01	0.01	0.01
Isupply, mA	4.2	4.2	4.2
Monolithic	yes	yes	yes
Number of Outputs	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85
Polyphase	no	no	no
Switch Current, A	1.2	1.2	1.2
Synchronous	no	no	no
Topology	Boost, Sepic, Flyback	Boost, Sepic, Flyback	Boost, Sepic, Flyback
Topology 1	Boost, Flyback, Sepic	Boost, Flyback, Sepic	Boost, Flyback, Sepic
Vin Max, V	16	16	16
Vin Min, V	2.45	2.45	2.45
Vin Min Startup, V	2.45	2.45	2.45
Vout Max, V	34	34	34
Vout Min, V	1.255	1.255	1.255
Vswitch Max, V	36	36	36

生态计划

	LT1930AES5#PBF	LT1930AES5#TRMPBF	LT1930AES5#TRPBF
RoHS	Compliant	Compliant	Compliant

其他选择

LT1930

设计须知

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SOT-23 Switching Regulator with Integrated 1A Switch Delivers High Current Outputs in a Small Footprint &mdash DN232
PDF, 91 Kb, 档案已发布: Jun 1, 2001
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advertisement SOT-23 Switching Regulator with Integrated 1A Switch Delivers
High Current Outputs in a Small Footprint вЂ“ Design Note 232
Albert Wu 5V Local Supply
Figure 1 shows a typical 3.3V to 5V boost converter
using the LT1930. The circuit can provide an impressive output current of 480mA while occupying less
than 0.3" by 0.35" of board area (less than 0.105 in2).
The efп¬Ѓciency, shown in Figure 2, remains above 83%
over a wide load current range of 60mA to 450mA,
reaching 86% at 200mA. The maximum output voltage
ripple of this circuit is 40mVP-P, which corresponds
to less than 1% of the nominal 5V output. Figure 3 is
an oscillograph of the transient response. The lower
waveform depicts a load step from 200mA to 300mA,
the middle waveform shows the inductor current and
the upper waveform shows the output voltage. The
output voltage remains within 1% of the nominal value
during the transient steps and displays a nice damped
response with little ringing.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their
respective owners. 06/00/232_conv L1
5.6ОјH VIN
3.3V …
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Fiber Optic Communication Systems Benefit from Tiny, Low Noise Avalanche Photodiode Bias Supply &mdash DN273
PDF, 246 Kb, 档案已发布: Dec 1, 2001
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Fiber Optic Communication Systems Benefit from Tiny, Low
Noise Avalanche Photodiode Bias Supply вЂ“ Design Note 273
Michael Negrete
Avalanche photodiodes (APDs) are the photo detectors of
choice for long-haul fiber optic communication systems
because of their high sensitivity and high internal gain. An
important characteristic of APDs is that their internal gain
is optimal when there is a high voltage reverse bias (30V
to 90V) across the APD. Nevertheless, the high gain is all
for naught if the sensitivity of the APD is compromised
by a noisy bias supply. The LT1930A, a capacitor-diode tripler and an external
DAC provide a bias voltage of up to 90V, allowing easy
temperature compensation (via the DAC) to optimize
internal gain. By running the IC at a switching frequency
of 2.2MHz, one can use tiny, low cost capacitors and
inductors to keep the circuit footprint under 0.5in2. The
LT1930AвЂ™s constant frequency PWM operation keeps
output noise low and easy to filter. Traditionally, such low noise bias supplies required custom circuits that brought with them another problem:
large space requirements. Linear TechnologyвЂ™s LTВ®1930A
2.2MHz step-up DC/DC converter in a 5-lead SOT-23
package solves these APD bias voltage problems and
does so in a compact package suitable for most fiber
optic applications. Figure 1 shows a high voltage, low noise APD bias supply …

文章

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1.1A Boost Provides Soft-Start Capability in Tiny ThinSOT Package &mdash LT Journal
PDF, 475 Kb, 档案已发布: Mar 25, 2005
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DESIGN FEATURES 1.1A Boost Provides Soft-Start
Capability in Tiny ThinSOT Package
Introduction by Brian Adolf L1
2.7ВµH
C1
4.7ВµF OFF ON C3
0.047ВµF 4 D1 6 1 VIN SW SHDN
LT3467
5
SS R1
402k C4
3.3pF VOUT
5V
765mA AT VIN = 4.2V,
540mA AT VIN = 3.3V,
360mA AT VIN = 2.6V 3 FB R2
133k GND
2 C2
15ВµF C1, C2: X5R OR X7R, 6.3V
D1: ON SEMICONDUCTOR MBRM120
L1: SUMIDA CR43-2R7 95
90
VIN = 4.2V 85 …
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SOT-23 Switching Regulator with Integrated 1 Amp Switch Delivers High Current Outputs &mdash LT Journal
PDF, 259 Kb, 档案已发布: May 1, 2000
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DESIGN FEATURES SOT-23 Switching Regulator with
Integrated 1 Amp Switch Delivers
High Current Outputs
by Albert Wu
The LT1930 is the only SOT-23
switching regulator in the industry
that includes an integrated 1A switch.
The LT1930 utilizes a constant frequency, internally compensated,
current mode PWM architecture. Its
1.2MHz switching frequency allows
the use of tiny, low cost capacitors
and low profile inductors. With an
input voltage range of 2.6V to 16V,
the LT1930 is a good fit for a variety of
applications. The onboard switch features a low VCESAT voltage of 400mV at
1A, resulting in very good efficiency
even at high load currents.
Figure 1 shows a typical 3.3V to 5V
boost converter using the LT1930. The circuit can provide an impressive
output current of 480mA. The efficiency remains above 83% over a
wide load current range of 60mA to
450mA, reaching 86% at 200mA. The
maximum output voltage ripple of …

模型线

系列: LT1930A (3)

LT1930AES5#PBF LT1930AES5#TRMPBF LT1930AES5#TRPBF

制造商分类

Power Management > Switching Regulator > LCD/CCD/OLED Bias | SEPIC Regulators
Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost