R1211N002D-TR-FE [RICOH]
Switching Controller, Current-mode, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN;
| 型号： | R1211N002D-TR-FE |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Controller, Current-mode, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN 开关 光电二极管 |
| 文件： | 总2页 (文件大小：184K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R1211x Series
PWM Step-up DC/DC Controller
The R1211x Series are low supply current CMOS-based PWM step-up DC/DC controllers. R1211x does not include an internal output
transistor. By simply using a power MOS, an inductor, a diode, resistors, and capacitors as external components, a high-efficiency
step-up DC/DC converter can be easily configured. R1211x is available in two versions: B/D versions with an internal phase
compensation and A/C versions with adjustable phase compensation with an external capacitor and resistor. The oscillator
frequency can be selected from 300kHz or 700kHz. The soft start function built into the controller is set to Typ. 10.5ms for 300kHz and
to Typ. 9ms for 700kHz. The latch type protection circuit embedded into the device latches the external driver in the "OFF" state when
the oscillator maximum duty cycle continues for a predetermined period of time setting by an external capacitor.
FEATURES
• Supply Current (IDD1)·······················Typ. 600μA (700kHz, VFB=0V, EXT at no load),
Typ. 300μA (300kHz, VFB=0V, EXT at no load)
• Oscillator Frequency (fosc)···············300kHz (C/D Versions)
700kHz (A/B Versions)
• Standby Current (Istandby) ·················Max. 1μA (In standby, only B/D Versions)
•
Oscillator Maximum Duty Cycle (Maxduty)··Typ. 90%
• UVLO Detect Voltage (VUVLO) ·········2.2V
• Input Voltage Range (VIN)···············2.5V to 6.0V
• Output Voltage Range ····················Externally adjustable (Feedback voltage : 1.0V) • Soft Start Time (tstart) ·······················Typ. 10.5ms (300kHz)
• Feedback Voltage Accuracy ···········± 1.5%
Typ. 9ms (700kHz)
•
Temp. coeff. of Feedback Voltage·····± 150ppm/°C
• Packages········································SON-6, SOT-23-6W
BLOCK DIAGRAMS
R1211x002A/C
R1211x002B/D
(External phase compensation type)
(Internal phase compensation type)
OSC
DTC
EXT
OSC
DTC
VFB
EXT
VFB
V
IN
AMPOUT
+
-
-
-
+
-
VIN
-
-
-
-
+
Vref
+
Vref
GND
GND
UVLO
+
UVLO
+
-
DELAY
DELAY
-
+
+
-
Latch
Latch
-
Chip
Enable
CE
SELECTION GUIDES
TYPICAL APPLICATIONS
R1211x002A/C
R1211x002B/D
Halogen Free Package Q'ty per Reel
Part No.
SD
SD
VOUT
VOUT
SON-6
3,000 pcs R1211D002
.
$-TR-FE
$-TR-FE
SOT-23-6W 3,000 pcs R1211N002
.
NMOS
C4
NMOS
V
IN
EXT
V
IN
EXT
C4
R1
R1
C3
C1
C2
C1
DELAY
$ : Select from (
.
A
.
) oscillator frequency of 700kHz, external phase
.
.
DELAY
GND
C3
V
FB
VFB
C2
R3
R3
compensation,
R2
R2
AMPOUT
CE
(
.
B
.
) oscillator frequency of 700kHz, internal phase compensation
GND
C5 R4
CE Control
with standby function,
(
.
C
.
) oscillator frequency of 300kHz, external phase compensation
NMOS : IRF7601, L : 10
SD : CRS02, C1 : 4.7 F, C2 : 0.22
C4 :680pF, C5 : 2200pF,
R3 : 30k , R4 : 30k
μ
H (002A), 22
μ
H (002C),
F,
NMOS : IRF7601, L : 10
22
C2 : 0.22
μ
H (002B),
or (
.
D
.
) oscillator frequency of 300kHz, internal phase
μ
μF, C3 : 10
μ
μ
H (002D), SD : CRS02, C1 : 4.7
μF,
compensation with standby function.
μ
F, C3 : 10
μ
F, C4 : 680pF, R3 : 30k
Ω
Ω
Ω
PACKAGES (Top View)
TYPICAL CHARACTERISTIC
R1211x002A Efficiency vs. Output Current
SON-6
SOT-23-6W
6 5 4
6
5
4
L=10μH, VOUT=5V
∗
100
80
60
1
2
3
1
2
3
1
2
3
4
5
6
DELAY
GND
EXT
VIN
1
2
3
4
5
6
DELAY
AMPOUT or CE
VFB
VIN
GND
EXT
40
20
V
V
IN=2.5V
IN=3.3V
VFB
0
AMPOUT or CE
1
10
100
1000
∗) The tab suspension leads on back side are substrate level (GND).
Output Current IOUT (mA)
APPLICATIONS
• Power source for hand-held equipment
• Power source for LCD and CCD
• Power source for automotive application
No.EK-088-111001
Step-up DC/DC Converter
1.The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest
information thereon.
2.The materials in this document may not be copied or otherwise reproduced in whole or in part
without prior written consent of Ricoh.
3.Please be sure to take any necessary formalities under relevant laws or regulations before
exporting or otherwise taking out of your country the products or the technical information
described herein.
4.The technical information described in this document shows typical characteristics of and
example application circuits for the products. The release of such information is not to be
construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual
property rights or any other rights.
5.The products listed in this document are intended and designed for use as general electronic
components in standard applications (office equipment, telecommunication equipment,
measuring instruments, consumer electronic products, amusement equipment etc.). Those
customers intending to use a product in an application requiring extreme quality and reliability,
for example, in a highly specific application where the failure or misoperation of the product
could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,
traffic control system, automotive and transportation equipment, combustion equipment, safety
devices, life support system etc.) should first contact us.
6.We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough
to incorporate safety measures in their design, such as redundancy feature, firecontainment
feature and fail-safe feature. We do not assume any liability or responsibility for any loss or
damage arising from misuse or inappropriate use of the products.
7.Anti-radiation design is not implemented in the products described in this document.
8.Please contact Ricoh sales representatives should you have any questions or comments
concerning the products or the technical information.
RICOH COMPANY., LTD. Electronic Devices Company
■Ricoh awarded ISO 14001 certification.
■
Ricoh presented with the Japan Management Quality Award for 1999.
The Ricoh Group was awarded ISO 14001 certification, which is an international standard for
environmental management systems, at both its domestic and overseas production facilities.
Our current aim is to obtain ISO 14001 certification for all of our business offices.
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After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that
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http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
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