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參數資料
| 型號： | TC105 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | PFM/PWM Step-Down DC/DC Controller |
| 中文描述： | 烤瓷/ PWM降壓DC / DC控制器 |
| 文件頁數： | 1/14頁 |
| 文件大?。?/td> | 433K |
| 代理商： | TC105 |
2002 Microchip Technology Inc.
DS21349B-page 1
TC105
Features
57
μ
A (Typ) Supply Current
1A Output Current
0.5
μ
A Shutdown Mode
300kHz Switching Frequency for Small Inductor
Size
Programmable Soft-Start
92% Typical Efficiency
Small Package: 5-Pin SOT-23A
Applications
Palmtops
Battery-Operated Systems
Portable Instruments
Positive LCD Bias Generators
Portable Communicators
Hand-Held Scanners
5V to 3V Down Converters
Device Selection Table
*Other
Microchip Technology Inc. for details.
output
voltages
are
available.
Please
contact
Package Type
General Description
The TC105 is a step-down (Buck) switching controller
that furnishes output currents of up to 1A (max) while
delivering a typical efficiency of 92%. The TC105
normally operates in pulse width modulation mode
(PWM), but automatically switches to pulse frequency
modulation (PFM) at low output loads for greater
efficiency. Oscillator frequency is 300kHz, allowing use
of small (22
μ
H) inductors. Supply current draw is only
102
μ
A (max), and is reduced to less than 0.5
μ
A when
the SHDN input is brought low. Regulator operation is
suspended during shutdown. The TC105 accepts a
maximum input voltage of 10V.
The TC105 is available in a small 5-Pin SOT-23A
package, occupies minimum board space and is ideal
for a wide range of applications.
Functional Block Diagram
Part
Number
Output
Voltage
(V)*
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC105503ECT
5.0
5-Pin SOT-23A
300
-40
°
C to +85
°
C
-40
°
C to +85
°
C
-40
°
C to +85
°
C
TC105333ECT
3.3
5-Pin SOT-23A
300
TC105303ECT
3.0
5-Pin SOT-23A
300
TC105
1
2
3
5
4
V
DD
GND
5-Pin SOT-23A
NOTE:
5-Pin SOT-23A is equivalent to the EIAJ SC-74A
V
OUT
SHDN
EXT
(From System
5
4
TC105333ECT
1
3
2
V
DD
EXT
GND
V
OUT
ON
OFF
SHDN
3.3V
V
OUT
L
1
22
μ
H (Sumida CD54)
D
1
MA737
Si 9430
P
V
BATT
6V
NiMH
C
1
10
μ
F/16V
R
SS
470K
C
0.033
μ
F
C2
47
μ
F
10V
Tantalum
3.3V Regulated Supply Using 6V
NiMH Battery Pack Input
+
–
PFM/PWM Step-Down DC/DC Controller
相關PDF資料 |
PDF描述 |
|---|---|
| TC105303ECT | PFM/PWM Step-Down DC/DC Controller |
| TC105503ECT | PFM/PWM Step-Down DC/DC Controller |
| TC105333ECT | PFM/PWM Step-Down DC/DC Controller |
| TC1073 | 50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and VREF Bypass |
| TC1073-285VCH | Circular Connector; Body Material:Aluminum; Series:PT07; No. of Contacts:55; Connector Shell Size:22; Connecting Termination:Crimp; Circular Shell Style:Jam Nut Receptacle; Circular Contact Gender:Pin; Insert Arrangement:22-55 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TC-105 | 制造商:Thomas & Betts 功能描述:CABLE TIE 制造商:Thomas & Betts 功能描述:CABLE TIE MTG BASE, ALUM, 25.4MM L X 12.7MM W; Mount Fixing Type:Adhesive / Screw; Mount Material:Aluminium; Mount Color:Metallic; Accessory Type:Cable Tie Mounting Base; Cable Tie Width Max:4.83mm; Length:25.4mm; Width:12.7mm ;RoHS Compliant: Yes 制造商:Thomas & Betts 功能描述:CABLE TIE MTG BASE, TY-RAP, 0.5 X 1 IN, ALUM; Mount Fixing Type:Adhesive / Screw; Mount Material:Aluminium; Mount Color:Metallic; Accessory Type:Mounting Base; Body Material:Aluminium; Color:Metallic; Mounting Type:Screw ;RoHS Compliant: Yes |
| TC105 | 制造商:Thomas & Betts 功能描述:CABLE FASTENER |
| TC-105 | 制造商:Thomas & Betts 功能描述:CABLE TIE .5X1" AL MTG BASE-TC2PA |
| TC105_13 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PFM/PWM Step-Down DC/DC Controller |
| TC10500A | 制造商:Mallory Sonalert Products Inc 功能描述: |
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