M62212FP.pdf 데이터시트 (총 8 페이지) - 파일 다운로드 M62212FP 데이타시트 다운로드

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MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
DESCRIPTION
M62212 is designed as a general purpose DC-DC converter.
This small 8 pin package contains many functions allowing
simpler peripheral circuits and compact set design.
The output transistor is open collector and emitter follower
type. This makes the control STEP-UP,STEP-DOWN and
INVERTING converter.
FEATURE
• Wide operation power supply voltage range •••••••2.5 ~ 18V
• Low power consumption••••••••••••••••••••••••1.3mA typ
• High speed switching is possible.(300kHz)
• Output short protection circuit and ON/OFF control are used.
The dead-time control and the soft-start operation are
possible
• Package variation : 8pin DIP/SOP/SSOP8
PIN CONFIGURATION(TOP VIEW)
Collector
output 1
Emitter
output
2
GND 3
Cosc 4
8 VCC
7 IN
6 FB
5 DTC
OUTLINE 8P2S-A (FP)
8P2X (GP)
8P4 (P)
APPLICATIONS
General electric products, DC-DC converter
BLOCK DIAGRAM
COSC 4
IN 7
OSC
VCC
OP Amp
1.25V
VCC
8
UVLO
VTH : 2.3V
PWM Comp
Collector
1 output
1.25V
VCC
Short protection
circuit
2 Emitter
output
1.86V
R
SQ
1.15V 0.3V
65
FB DTC
(1/8)
3
GND

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MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise noted)
Symbols
Items
Vcc Power supply voltage
Conditions
Ratings
19
Units
V
Vo Output voltage
19 V
Io Output current
150 mA
Pd Power dissipation
Ta=25°C
625 (P) 360(FP) 250(GP) mW
Ktheta Thermal derating ratio
Ta>25°C
5.00 (P) 2.88 (FP) 2.00(GP) mW/°C
Topr
Operating ambient temperature
-20°C ~ +85
°C
Tstg
Storage temperature
-40°C ~ +125
°C
Electrical Characteristics ( Ta=25°C, Vcc =12V, Cosc=100pF unless otherwise noted )
Block Symbol
Items
Test condition
All
device
Std.
voltage
section
VCC
I CC ST
V REF
L INE
IB
Range of power supply voltage
Standby current
Standard voltage
Line regulation
Input bias current
Output "OFF" status
Voltage follower
VCC=2.5 ~ 18V
A V Open loop gain
Error
amp.
section
GB
VOM +
VOM -
I
+
OM
I OM -
Unity gain bandwidth
Output high voltage
Output low voltage
Output sink current
Output source current
VFB=1.86V
VIN =1V
f OSC
Oscillation frequency
Oscil-
lator
section
VOSCH
VOSCL
I OSC CH
Upper limit voltage of oscillation waveform
Lower limit voltage of oscillation waveform
Cosc charge current
I OSC DIS1 Cosc discharge current 1
UVLO
section
VTH ON
VTH OFF
VHYS
Start-up threshold voltage
Shut-down threshold voltage
Hysteresis
VIN =1V
VIN =1V
VHYS = VTHON - VTHOFF
Limits
Units
Min Typ Max
2.5 18 V
1.3 1.8 mA
1.19 1.25
5
1.31 V
12 mV
500 nA
80 dB
0.6 MHz
1.82
2.62 V
400 mV
6 mA
-60 -30 uA
110 kHz
1.0
0.45
V
V
-40 uA
10 uA
2.2 2.3 2.4 V
2.25 V
20 50
80 mV
(2/8)

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MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
Electrical Characteristics ( Ta=25°C, Vcc =12V, Cosc=100pF unless otherwise noted )
Block Symbol
Items
Test condition
Short
pro-
tection
circuit
Output
section
VTH FB
VTH DTC
VTL DTC
I CH1
I DIS1
I CH2
I DIS2
I CL
VSAT1
VSAT2
FB threshold voltage
VIN =1V,VDTC=0.7V
Latch mode "H" threshold voltage VIN =1V,VFB =2.11V
Latch mode "L" threshold voltage VIN =1V,VFB =2.11V
DTC charge current when start-up VDTC=0.7V,VFB =2.11V
DTC discharge current 1
VDTC=0.7V,VFB =2.11V
DTC charge current when stable state VDTC=0.7V,VFB = 0.7V
DTC discharge current 2
VDTC=0.2V,VFB =2.11V
Collector output leak current
Collector output saturation voltage 1
Collector output saturation voltage 2
VCE=18V , VCC=18V
Emitter GND,
IC=150mA,VE=0V
Emitter follower,
IE=50mA,VC=12V
Limits
Units
Min Typ Max
1.86
1.15
V
V
0.3 V
-45 µA
50 µA
-10 µA
15 µA
-1 1 µA
0.3 1.1 V
1.6 V
(3/8)

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MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
1. Application Circuit (STEP-DOWN converter with current buffer transistor)
VIN
CIN
8
1
COSC
4
7
6
M62212
5
L
D
2
3
VOUT
R1 COUT
R2
(4/8)

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MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
2. FUNCTION DESCRIPION
1) Soft Start (The peripheral circuit is shown in Fig.1)
When the power is turned ON, input terminal IN is at 0V level. Therefore, the FB
terminal is fixed to High level. The DTC terminal goes up gradually starting from 0V
due to the internal charge current and the external CDTC.
When the level of DTC terminal reaches the lower limit of the triangular wave of the
oscillator, PWM comparator and the output circuit go into operation causing the output
voltage, "Vo" of the DC-DC converter to rise. The charge current is designed to be
approximately 45µA.
FB
OSC
DTC
1.0V
0.45V
OFF
External Tr collector
ON
Fig.2
2) DTC
The dead time control is set by installing a resistor between the DTC terminal and GND.
However, the DTC terminal serves as the short protection circuit also. Therefore, its set up
depends on whether the short protection circuit is used and not.
(When the short protection circuit is used)
At this time, the charge current for DTC is approximately 10µA . Therefore, RDTC should
be set to 40K~ 110K.
(When the short protection circuit is not used)
At this time, the charge current for DTC is approximately 45µA. Therefore, RDTC is set to
12KÅ`25K.
(5/8)