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參數(shù)資料
| 型號： | R1282D002A-TR-F |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO10 |
| 封裝： | LEAD FREE, SON-10 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 157K |
| 代理商： | R1282D002A-TR-F |
R1282D Series
No.EK-118-091101
Step-up/Step-down DC/DC Converter
The R1282D Series are low supply current dual output CMOS-based PWM step-up/step-down DC/DC controllers. R1282D includes a
soft start circuit, an under-voltage lockout circuit (UVLO), and a latch type protection circuit.
By simply using inductors, resistors,
capacitors, power MOS, and diodes, as external components, a high-efficiency step-up/step-down DC/DC converter can be easily configured.
The oscillator maximum duty cycle, phase compensation, and soft start time can be set with an external resistor and capacitor.
FEATURES
Supply Current (I
DD
)······································· Typ. 1.4mA
(V
IN
=5.5V, EXT at no load)
Input Voltage Range (V
IN
)······························ 2.5V to 5.5V
Step-up Feedback Voltage (V
FB1
) ·················· 1.0V
Step-down Feedback Voltage (V
FB2
)·············· 1.0V
Feedback Voltage Accuracy··························
±
1.5%
Reference Voltage Output (V
REFOUT
)·············· 1.5V (
±
15mV)
BLOCK DIAGRAM
Oscillator Frequency (f
osc
)···············700kHz
UVLO
Detect Voltage (V
UVLO
)··········2.2V
Latch Type Protection Circuit··········Delay time for protection
Package··········································SON-10
Ceramic capacitors can be used. ···10
μ
F or more
Typ. 100ms
TYPICAL APPLICATION
R1282D002A
L2
NMOS
R5
L1
R1
R2
C1
PMOS
C8
R3
R4
C2
C9
R11
V
OUT1
V
OUT2
R9
SD
R6
C7
SD
C6
C4
R7
R8
C3
C5
R10
EXT1
GND
DTC1
V
FB1
V
FB2
DTC2
V
REFOUT
V
IN
EXT2
AMPOUT1
1
2
3
4
5
10
9
8
7
6
R1282D002A
V
FB1
5
V
FB2
V
REFOUT
1
9
Vrefout
DTC2
GND
V
IN
4
AMPOUT1
3
2
7
8
6
10
OSC
Vref1
Delay Circuit
Latch
Vref2
CH2
DTC1
UVLO
EXT1
EXT2
CH1
L1, L2 : 6.8
μ
H, SD : FS1J3, NMOS : IRF7601, PMOS : Si3443DV, C1=C2=10
μ
F
SELECTION GUIDE
Package
Quantity per Reel
Part No.
SON-10
3,000 pcs
R1282D002A-TR-F
PACKAGE
TYPICAL CHARACTERISTICS
SON-10
R1282D002A Efficiency vs. Output Current
L1=6.8
μ
H,C1=10
μ
F,V
OUT2
=2.5V,I
OUT2
=0mA
10 9 8 7 6
1 2 3 4 5
6 7 8
9 10
5 4 3
2 1
Bottom View
Top View
1
2
3
4
5
6
7
8
9
10
EXT1
GND
AMPOUT1
DTC1
V
FB1
V
FB2
DTC2
V
REFOUT
V
IN
EXT2
0
150
100
50
Output Current I
OUT
(mA)
200
10
30
50
60
90
V
OUT1
=5V
V
OUT1
=10V
V
OUT1
=15V
80
20
40
70
0
E
η
(
0
300
200
100
600
Output Current l
OUT
(mA)
10
30
50
60
90
V
OUT2
=1.8V
V
OUT2
=2.5V
L2=6.8
μ
H,C2=10
μ
F,V
OUT1
=10V,I
OUT1
=0mA
80
20
40
70
0
500
400
E
η
(
) The tab suspension leads on back side are substrate level (GND).
APPLICATIONS
Power source for hand-held equipment
Power source for LCD and CCD
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