CALLM FA3630V Datasheet
FA3630V
FA3630V
CMOS IC
For Switching Power Supply Control
■ Description
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.
■ Features
• 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)
■ Applications
• Power supply for general equipment
■ Block diagram
■ Dimensions, mm
Á TSSOP-16
5.2
9
8
0.65
0.2
16
1
±0.05
4.4
±0.05
0.07
±0.1
6.4
–0.04
+0.02
0.17
1.1max
0~8˚
0.5
±0.08
Pin Pin Description
No. symbol
1 ON/OFF ON/OFF function
2 IN2+
3 IN2– Ch.2 inverting input to error
4 FB2 Ch. 2 output of error amplifier
5 SEL Selection of type of MOSFET
6 GND Ground
7 CS2 Soft start for Ch. 2
8 OUT2 Ch. 2 output (for Nch or Pch-
9 OUT1 Ch.1 outout (for Nch-MOSFET)
10 CS1 Soft start for Ch.1
11 VCC Power supply
12 VREG Regulated voltage output
13 FB1 Ch.1 output of error amplifier
14 IN1– Ch.1 inverting input to error
15 CP Timing capacitor for timer latch
16 CT Oscillator timing capacitor
Ch. 2 non-inverting input to error
amplifier
amplifier
drived
MOSFET)
amplifier
delay
1
FA3630V
■ Absolute maximum ratings
Item Symbol Rating Unit
Power supply voltage VCC 6.5 V
Source peak current of OUT1/2
Sink peak current of OUT1/2
Input voltage for logic input VLOG –0.3 to +6.5 V
Output current of VREG IREGMAX –10 mA
Total power dissipation* Pd 300 mW
Junction temperature TJ 125 °C
Ambient temperature TOP –20 to +85 °C
Storage temperature Tstg –40 to +125 °C
Ta ⬉ 25°C
*
IOUT+ –500 mA
IOUT– 500 mA
■ Recommended operating conditions
Item Symbol Min. Max. Unit
Power supply voltage VCC 2.5 5.5 V
Input voltage for logic input VLOG 0 5.5 V
Oscillation frequency fOSC 100 1000 kHz
■ 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 VREG=0 to 5mV 5 mV
Variation with supply voltage VRGLIN VCC=2.5 to 5.5V 8 mV
Variation with temperature VRGTa Ta=–20 to +25°C ±0.5 %
Ta=+25 to +85°C ±0.5 %
Reference voltage section
Item Symbol Test condition Min. Typ. Max. Unit
Reference voltage VREF 0.98 1.00 1.02 V
Variation with supply voltage VRGLIN VCC=2.5 to 5.5V 1 5 mV
Variation with temperature VRGTa Ta=–20 to +25°C ±0.5 %
Ta=+25 to +85°C ±0.5 %
Oscillator section
Item Symbol Test condition Min. Typ. Max. Unit
Oscillation frequency fOSC CT=100pF 437 485 533 kHz
High level voltage VOSCH CT=100pF 1.39 V
Low level voltage VOSCL CT=100pF 0.77 V
Variation with supply voltage fdV VCC=2.5 to 5.5V ±1 ±5%
Variation with temperature fdT Ta=–20 to +25°C ±5%
Ta=+25 to +85°C ±5%
Error amplifier section
Item Symbol Test condition Min. Typ. Max. Unit
Input offset voltage VIOF 310mV
Common mode input voltage VICOM 0.2 1.5 V
DC open loop gain AVOL 70 75 dB
Unity gain band width fT 1.6 MHz
Output sink current IFBL VFB=0.5V 2.0 2.5 3.0 mA
Output source current IFBH VFB=VREG–0.5V –160 –125 –90 µA
2
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