Fuji FA3630V For switching power supply control Datasheet

CMOS IC
For Switching Power Supply Control
FA3630V
FA3630V
■ Description
■ Dimensions, mm
FA3630V is a DC-DC converter controller.
This IC can directly drive a Nch/Pch-MOSFET.
This IC is suitable to reduce converter size because it has
many functions in a small package TSSOP.
Á TSSOP-16
9
16
0.2±0.05
0.5±0.08
1.1max
0~8˚
5.2
2
0.17+0.0
–0.04
8
1
0.07±0.05
• Low input voltage: 2.5V to 6.5V
• 2-channels PWM control: Rail-to-rail output
Output impedance of output stage = 3.5Ω (typ.)
Nch-MOSFET driving (Ch1)
Nch/Pch-MOSFET driving (Ch2)(selected by SEL pin)
• Low power consumption: 0.7mA (typ.)
• ON/OFFcontrol: Standby current= 0.1µA (typ.)
• ±2% high accuracy reference voltage
• Adjustable soft start time and maximum duty cycle
• Adjustable built-in timer latch for short circuit protection
• Wide range of operation frequency: 100kHz to 1MHz
• Package: TSSOP-16 (Thin and small)
4.4
6.4±0.1
■ Features
0.65
■ Applications
• Power supply for general equipment
■ Block diagram
Pin
No.
Pin
symbol
Description
1
ON/OFF
ON/OFF function
2
IN2+
Ch. 2 non-inverting input to error
amplifier
3
IN2–
Ch.2 inverting input to error
amplifier
4
Ch. 2 output of error amplifier
5
FB2
SEL
6
GND
Ground
7
CS2
OUT2
Soft start for Ch. 2
OUT1
CS1
VCC
Ch.1 outout (for Nch-MOSFET)
Regulated voltage output
14
VREG
FB1
IN1–
15
CP
Timing capacitor for timer latch
delay
16
CT
Oscillator timing capacitor
8
9
10
11
12
13
1
Selection of type of MOSFET
drived
Ch. 2 output (for Nch or PchMOSFET)
Soft start for Ch.1
Power supply
Ch.1 output of error amplifier
Ch.1 inverting input to error
amplifier
FA3630V
■ Absolute maximum ratings
Item
Symbol
VCC
Source peak current of OUT1/2 IOUT+
Sink peak current of OUT1/2 IOUT–
Input voltage for logic input VLOG
Power supply voltage
Output current of VREG
Total power dissipation*
Junction temperature
Ambient temperature
Storage temperature
IREGMAX
Pd
TJ
TOP
Tstg
■ Recommended operating conditions
Rating
Unit
Item
Symbol
Min.
Max.
Unit
6.5
V
Power supply voltage
2.5
5.5
V
–500
mA
Input voltage for logic input
0
5.5
V
500
mA
Oscillation frequency
VCC
VLOG
fOSC
100
1000
kHz
–0.3 to +6.5
V
–10
mA
300
mW
125
°C
–20 to +85
°C
–40 to +125
°C
* Ta ⬉ 25°C
■ Electrical characteristics (VCC=3.3V, Ta=25°C, CT=100pF)
Regulated voltage section for internal control blocks
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Regulated voltage
VREG
IREG=no load
2.156
2.200
2.244
V
Variation with output current
VRGOUT
VRGLIN
VRGTa
VREG=0 to 5mV
VCC=2.5 to 5.5V
Variation with supply voltage
Variation with temperature
5
mV
8
mV
Ta=–20 to +25°C
±0.5
%
Ta=+25 to +85°C
±0.5
%
Reference voltage section
Item
Symbol
Reference voltage
VREF
VRGLIN
VRGTa
Variation with supply voltage
Variation with temperature
Test condition
Min.
Typ.
Max.
Unit
0.98
1.00
1.02
V
VCC=2.5 to 5.5V
1
5
mV
Ta=–20 to +25°C
±0.5
%
Ta=+25 to +85°C
±0.5
%
Oscillator section
Item
Symbol
Test condition
Min.
Oscillation frequency
fOSC
CT=100pF
437
High level voltage
VOSCH
VOSCL
fdV
fdT
CT=100pF
CT=100pF
VCC=2.5 to 5.5V
1.39
Ta=–20 to +25°C
±5
%
Ta=+25 to +85°C
±5
%
Low level voltage
Variation with supply voltage
Variation with temperature
Typ.
Max.
485
533
kHz
V
0.77
±1
Unit
V
±5
%
Error amplifier section
Item
Symbol
Input offset voltage
Output sink current
VIOF
VICOM
AVOL
fT
IFBL
VFB=0.5V
2.0
2.5
3.0
mA
Output source current
IFBH
VFB=VREG–0.5V
–160
–125
–90
µA
Common mode input voltage
DC open loop gain
Unity gain band width
Test condition
Min.
Typ.
Max.
Unit
3
10
mV
1.5
V
0.2
70
75
dB
1.6
MHz
2
FA3630V
ON/OFF logic input signal section
Item
Symbol
Test condition
Min.
Input range for ON mode
VONH
VONL
VCC=2.5V to 5.5V
VCC=2.5V to 5.5V
2.0
Item
Symbol
Test condition
Input range for driving Nch-MOSFET
VSELH
VSELL
Input range for OFF mode
Typ.
Max.
Unit
V
0.5
V
SEL logic input signal section
Input range for driving Pch-MOSFET
Min.
Typ.
Max.
Vcc–0.5
Unit
V
0.5
V
Timer latch protection section
Item
Symbol
Threshold voltage of CP
Charge current of CP
VCPTH
ICP
Threshold voltage of FB1/FB2
VFBTL
Test condition
VCP=VREG–0.5V
Min.
Typ.
Max.
Unit
1.55
1.70
1.85
V
–2.5
–2.1
–1.7
µA
1.56
1.73
1.90
V
Soft-start section
Item
Symbol
Test condition
Min.
Typ.
Max.
Unit
Threshold voltage of CS1/2
VCS 0
VCS 100
Duty cycle=0%
0.74
0.79
0.84
V
Duty cycle=100%
1.29
1.34
1.39
V
Symbol
Test condition
Min.
Typ.
Max.
Unit
RON
IOUT =±100mA
VCC=3.3V
CLOAD=1000pF
3.5
7
Ω
VCC=3.3V
CLOAD=1000pF
VCC=3.3V
Threshold voltage of CS1/2
Output section
Item
ON resistance
OUT1 ( High / Low )
OUT2 ( High / Low )
Rise time
OUT1
tr
OUT2
Fall time
OUT1
tf
OUT2
3.5
7
Ω
25
35
ns
25
35
ns
25
35
ns
25
35
ns
Overall device
Item
Symbol
Test condition
Typ.
Max.
Unit
Standby current
ICC0
ON/OFF=GND
Min.
0.1
5
µA
Operating average current
ICC
OUT1, OUT2: Open
0.7
1
mA
Output duty=100%
(Reference value) OUT1, OUT2: Open
IN– and FB: Shorted
3
1.5
mA
FA3630V
■ Characteristic curves (Ta=25°C)
Supply current (ICC) vs. supply voltage (VCC)
Oscillation frequency (fOSC) vs. timing capactior(CT)
1.1
10000
1
0.9
0.7
fosc [kHZ]
ICC [mA]
0.8
0.6
0.5
1000
0.4
100
0.3
0.2
0.1
0
0
1
2
3
4
5
10
10
6
100
100
90
90
80
80
70
60
50
40
30
70
60
50
40
30
20
20
10
10
0
0.5
0
1000
Output duty cycle vs. CS terminal voltage (VCS)
Output duty cycle [%]
Output duty cycle [%]
Output duty cycle vs. FB terminal voltage (VFB)
0
500
100
CT [pF]
VCC [V]
1
1.5
2
0.5
0
1
1.5
2
VCS [V]
VFB [V]
Oscillation frequency (fOSC ) vs. ambient temperature (Ta)
Reference voltage (VREF) vs. ambient temperature (Ta)
500
1.01
Vcc=3.3V
CT=100pF
490
VREF [V]
fOSC [kHZ]
1.005
480
470
1
460
0.995
450
440
– 30
– 10
10
30
Ta [°C]
50
70
90
0.99
– 30
– 10
10
30
50
70
90
Ta[°C]
4
FA3630V
H-level output voltage (VOH1) vs. output source current (ISOURCE1)
2.4
2.4
2.2
2.2
2
2
1.8
1.8
1.6
1.6
VCC– VOH1 [V]
VOL1 [V]
L-level output voltage (VOL1) vs. output sink current (Isink1)
1.4
VCC=3.3V
1.2
1
1.4
VCC=3.3V
1.2
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
50
100
150
200
250
0
300
0
50
ISINK 1 [mA]
2.2
2
2
1.8
1.8
1.6
1.6
VCC– VOH2 [V]
VOL2 [V]
2.4
2.2
1.4
VCC=3.3V
1.2
1
0.4
0.4
0.2
0.2
200
250
300
Condition: Open loop
180
160
140
120
100
Phase
80
60
40
Voltage gain
20
0
– 20
– 40
100
1K
10K
100K
ƒ [HZ]
0
0
50
100
150
200
ISOURCE 2 [mA]
Error amplifier voltage gain (Av) / phase (θ) vs. frequency (f)
Av [dB]
[deg]
1
0.6
ISINK 2 [mA]
5
VCC=3.3V
0.8
150
300
1.2
0.6
100
250
1.4
0.8
50
200
H-level output voltage (VOH2) vs. output source current (ISOURCE2)
2.4
0
150
ISOURCE 1 [mA]
L-level output voltage (VOL2) vs. output sink current (Isink2)
0
100
1M
10M
250
300
FA3630V
■ Application circuit
Parts tolerances characteristics are not defined in the circuit design
sample shown above. When designing an actual circuit for a product,
you must determine parts tolerances and characteristics for safe and
economical operation.
6
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