--
Output source current Output sink current
ISOURCE ISINK
VCOMP=450mV
MIN. 495
-1.0 0.78 24
TYP. 500
5 1 -0.2 100 6 0.87 0.05 -40 40
MAX. UNIT
505 mV
20 mV
-
%
1.0 μA
Oscillation frequency Frequency change with voltage Frequency change with temperature
SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
f
RT=3.0KΩ,CT=270pF 400 500 600 KHz
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webONAL BLOCK DIAGRAM
3
7
Reference voltage supply
1.25V
0.8V 0.1V
Sawtooth wave oscillator
VCOMP=450mV VCC=2V to 15V Ta = -10℃to 85℃
Input bias current
IB
--
Voltage Gain
Av
--
Frequency bandwidth
BW
Av=0 dB
Output voltage Positive
VPOS
--
Swing
Negative
VNEG
PARAMETER
SYMBOL TEST CONDITIONS
Input source current
ISCP
VSCP= 0V
S.C.P. threshold voltage
VSCP
--
MIN. -1.5 0.7
TYP. -1.0 0.8
MAX. UNIT -0.7 μA 0.9 V
Oscillator section PARAMETER
PARAMETER
SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Low threshold voltage
VLOW
--
-
-
0.9
V
Upper threshold voltage
VUPPER
--
1.1 1.3 1.5 V
Soft Start section (S.S.) PARAMETER
Input source current Soft start threshold voltage
SYMBOL ISS VSST
TEST CONDITIONS VSCP= 0V --
MIN. -1.5 0.8
TYP. MAX. UNIT -1.0 -0.7 μA 0.9 1.0 V
Short Circuit Protection section (S.C.P.)
0.1V
PWM
1
36kΩ
+ Error Amp.
Comp. + + +
Output drive control circuit
0.5V
500KΩ
DTC 0.6V
0.22V
8
Soft start & SCP circuit
6
2
4
5 30kΩ
MARK VIEW
1 2
GS3660
3 4
PIN DESCRIPTION
GS3660
BOOST CONVERT CONTROL IC
GENERAL DESCRIPTION
The GS3660B is a boost topology switching regulator control IC for battery-used applications field. The GS3660B includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operating mode or standby mode.
Error Amplifier section
PARAMETER
SYMBOL TEST CONDITIONS
Input threshold voltage VT change with voltage VT change with temperature
VFB ΔVFB / ΔV ΔVFB / ΔT
390
-
MAX. UNIT 0.3 V
5000 Ω
0
μA
-45 μA
-0.1 mA
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TYPICAL CHARACTERISTICS
Supply Current (mA)
Supply Voltage VS Supply Current
-20 -30
-40 -50
High Level Output Current Iout (mA)
IAVE
RB=390Ω,VCC=0~20V -
TYP. -
5.0
MAX. UNIT
1
μA
10 mA
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GS3660
DC ELECTRICAL CHARACTERISTICS (Cont.)
Ambient Temperature Ta (℃)
Figure 3
Input Threshold Voltage Variation △V/V(%)
Low Level Output Voltage Vout (V)
Low Level Output
600
VCC=2V
500
RB=390Ω
Ta=25℃
400
6 OUT 5 O Totem-pole output
GND 6 P IC ground
5
OSC 7
I
Capacitor and resistor connected for the frequency of oscillation
COMP 8 O Error amplifier compensation output
RO
--
MIN. 1.0
0.8
-
-
30 20
TYP. 1.2
1.0
0.1
0.1
-40 40 30
MAX. UNIT
-
V
-
V
0.2 V
0.2 V
-20 mA
-
mA
40 kΩ
Output Current Setting / Control section
PARAMETER
SYMBOL TEST CONDITIONS
Name No. I/O
Description
FB 1 I Error amplifier inverting input pin
8
SCP 2
I
Connected a capacitor Soft start and SCP function pin
7
VCC 3
EN/OFF 4
P IC power supply I Output current setting and control pin
SYMBOL TEST CONDITIONS
VOH1 VOH2 VOL1 VOL2 IOSOURCE IOSINK
RB=390Ω, IO=-15mA RB=750Ω, IO=-10mA, VCC= 1.8V RB=390Ω, IO=15mA RB=750Ω, IO=10mA, VCC= 1.8V RB=390Ω, Vo=0.9V RB=390Ω, Vo=0.3V
FEATURES
˙Wide supply voltage operating range: 1.8 to 15V ˙Reference voltage precision: 2% ˙Low current consumption: Operation Mode 5.5mA
Standby-by Mode 1μA ˙High speed oscillator frequency: 1MHz max. ˙Programmable Soft Start function (SS) ˙Short Circuit Protection function(SCP) ˙Totem-pole output with adjustable on/off current
- V/V
- MHz
V
0.2
-24 μA
-
μA
Output section PARAMETER
Output high voltage
Output high voltage
Output saturation voltage
Output saturation voltage