Download Schottky barrier diode RB751S-40

RB751S-40
Schottky barrier diode 参考資料
Absolute maximum ratings (Ta = 25℃)
Features
1) Small surface mounting type.
(EMD2, UMD2)
2) Low reverse current and
low forward voltage.
External dimensions
(Units : mm)
3) High reliability.
Construction
R OHM : E MD2
E IAJ : S C -79
Silicon epitaxial planar
Applications
High speed switching
For Detection
J E DE C : S OD-523
C AT HODE MAR K
S ymbol
Limits
Unit
P eak revers e voltage
P arameter
VRM
40
V
DC revers e voltage
VR
30
V
Mean rectifying current
IO
30
mA
P eak forward s urge current *
IF S M
200
mA
J unction temperature
Tj
125
℃
S torage temperature
T s tg
-40~+125
Electrical characteristics (Ta = 25℃)
1.6±0.1
1.2±0.05
P arameter
S ymbol
0.12±0.05
0.3±0.05
0.8±0.05
R B 751S -40
0.6±0.1
Min.
T yp.
VF
F orward voltage
5
R evers e current
IR
C apacitance between terminals
CT
℃
* 60 Hz for 1
Max.
Unit
0.37
V
0.5
A
2.0
pF
C onditions
I F = 1mA
V R = 30V
V R = 1V , f = 1MHz
Note) E S D s ens itive product handling required.
づ
F E AT UR E S ／特 長
け
面実装用 固定インダクタ
D53LC
小型薄形構造（5.2mm角Max.、高さ3.0mm Max.）
閉磁路構造、低直流抵抗
大電流対応
各種機器のDC-DCコンバータ用インダクタに最適
· RoHS指令対応
·
·
·
·
参考資料
T Y P E D53L C (High c urrent T ype 大電流タイプ, Quantity/reel; 2,000 P C S )
東光品番
T OK O
P art
Number
#A915AY -470M
インダクタンス
許容差
直流抵抗
Induc tanc e
( µH)
T oleranc e
(%)
DC
R es is tanc e
(mΩ) Max.
(T yp.)
47.0
± 20
352 (293)
直流重畳許容電流
温度上昇許容電流
Induc tanc e Dec reas e C urrent T emperature
R is e C urrent
(A ) Max. (T yp.)
ΔT =40 ℃
ΔL
ΔL
=10%
=30%
L
L
(A ) Max. (T yp.)
0.53 (0.71)
0.62 (0.83)
0.68 (0.80)
HT7733A
HT77XXA
PFM Step-up DC/DC Converter
Electrical Characteristics
Symbol
Features
Ultra low supply current IDD: 5μA(Typ.)
Low ripple and low noise
High efficiency: 85% (Typ.)
High output voltage accuracy: ±2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 5.0V
LX
GND
5
Low shutdown current: 0.5μA(Typ.)
4
750A#
TO92, SOT89, SOT23 and SOT23-5 package
Output current up to 200mA
1
2
3
CE
VOUT
NC
Applications
Palmtops/PDAs
Cameras/Camcorders
Portable communicators/Smartphones
Battery-powered equipment
General Description
The HT77XXA series is a set of PFM step-up DC/DC
converter with high efficiency and low ripple. The series
features extremely low start-up voltage and high output
voltage accuracy. They require only three external components to provide a fixed output voltage of 2.7V, 3.0V,
3.3V or 5.0V. CMOS technology ensures ultra low supply current and makes them ideal for battery-operated
applications powered from one or more cells.
Pin Description
Pin No.
SOT23-5
Pin Name
1
CE
2
VOUT
3
NC
4
GND
5
LX
CE
VOUT
NC
SOT23-5
The HT77XXA consists of an oscillator, a PFM control
circuit, a driver transistor, a reference voltage unit, and a
high speed comparator. They employ pulse frequency
modulation (PFM) for minimum supply current and ripple at light output loading. These devices are available
in space saving TO92, SOT89, SOT23 and SOT23-5
packages. For SOT23-5 package, it also build-in a chip
enable function to reduce power consumption during
shutdown mode.
参考資料
Low start-up voltage: 0.7V (Typ.)
VIN=VOUT 0.6; IOUT=10mA; Ta=25 ℃(Unless otherwise specified)
Parameter
Test Conditions
VIN
Input Voltage
VOUT
Output Voltage Tolerance
VSTART
Start-up Voltage (Fig. 1)
VHOLD
Minimum Hold-on Voltage (Fig. 1) VIN: 2 → 0V; IOUT=1mA
IIN
No-load Input Current (Fig. 1)
IOUT=0mA
IDD
Supply Current (Fig. 2)
VS=VOUT+0.5V
Measured at VOUT pin
ISHDN
Shutdown Current
CE=GND
VIH
CE High Threshold
VIL
CE Low Threshold
Min.
Typ.
Max.
Unit
6
V
2.5
%
0.9
V
0.7
V
13
26
A
5
10
A
0.5
1
2.5
VIN: 0 → 2V; IOUT=1mA
0.7
2
ILEAK
LX Leakage Current (Fig. 3)
VS=VOUT+0.5V, VX=6V
Measured at the LX pin
fOSC
Maximum Oscillator Frequency
(Fig. 3)
VS=VOUT 0.95, VX=6V
Measured at LX pin
DOSC
Oscillator Duty Cycle (Fig. 3)
VS=VOUT 0.95, VX=6V
Measured at LX pin
0.4
V
0.9
A
200
65
Efficiency
A
V
75
kHz
85
85
%
%
Note:
Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings
indicate conditions for which the device is intended to be functional, but do not guarantee specific performance
limits. The guaranteed specifications apply only for the test conditions listed.
With CE Pin
SR0602 Series
ABC Electronics Corp.
47μH-100μH
1N5817
VIN
Description
VOUT
Chip enable pin, high active
DC/DC converter output monitoring pin
47μF(Tantalum)
No connection
LX
HT77XXA
Series
VOUT
22μF(Tantalum)
CE
Ground pin
GND
Switching pin
Absolute Maximum Ratings
Supply Voltage ..............................VSS−0.3V to VSS+7V
Operating Temperature ...........................−40℃t o 85 ℃
SR0602 Series
ABC Electronics Corp.
47μH-100μH
HT7733A Output Voltage v.s Output Current
Storage Temperature ............................−50℃t o 125 ℃
1N5817
VIN
VOUT
Block Diagram
Vref
LX
LX Limiter
VOUT
47μF(Tantalum)
OSC 200kHz
LX
HT77XXA
Series
VOUT
22μF(Tantalum)
CE
Buffer
GND
PFM Control
Chip Enable
CE
GND
Note:
HT7733A Ripple Voltage v.s Output Current
(CIN=47μF-Tantalum,L=47μH,COUT=22μF-Tantalum)
For the SOT23-5 package, when CE is pulled low, the internal blocks of the device, such as the reference band
gap, gain block, and all feedback and control circuitry will be switched off. The boost converter s output, VOUT,
will be at a value one Schottky diode voltage drop below the input voltage and the LX pin remains in a high impedance condition. The output capacitor and load at VOUT determine the rate at which VOUT decays.