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PDF OCP3601 Data sheet ( Hoja de datos )
| Número de pieza | OCP3601 | |
| Descripción | Step-Up DC/DC Controller | |
| Fabricantes | OCS | |
| Logotipo |  |
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OCP3601
Step-Up DC/DC Controller
General Description
The OCP3601 is a boost topology switching regulator control IC for battery-used applications field. The OCP3601
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.
Features
Wide supply voltage operating range: 1.8 to 15V
Reference voltage precision: 4%
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
(for NPN transistors or n-channel MOSFET)
Logic level control stand-by mode function
Package: SOP8/MSOP8/TSSOP8
Typical Application
Digital Camera
PDA
Portable Equipment
Pin Assignment
SOP8
MSOP8
TSSOP8
FB 1
SCP 2
Vcc 3
BR/CTL 4
OCP3601
8 COMP
FB
7 OSC
SCP
6 GND
Vcc
BR/CTL
5 OUT
1
2
3
4
OCP3601
8 COMP
FB 1
7 OSC
6 GND
SCP 2
Vcc 3
5 OUT BR/CTL 4
OCP3601
8 COMP
7 OSC
6 GND
5 OUT
Pin Description
Name
FB
SCP
VCC
BR/CTL
OUT
GND
OSC
COMP
No.
1
2
3
4
5
6
7
8
I/O Description
I Error amplifier inverting input pin
I
Connected a capacitor
Soft start and SCP function pin
P IC Power supply
I Output current setting and control pin
O Totem-pole output
P IC ground
I Capacitor and resistor connected for the frequency of oscillation
O Error amplifier compensation output
Page1 - 17
Rev. 1.1 Sep 26, 2005
Free Datasheet http://www.Datasheet4U.com
1 page  
Typical Characteristics
Supply voltage vs. Supply current
12
Ta=25℃
10 RB=390Ω
8
-10
6
4
2
0 4 8 12 16 20
Supply voltage Vcc (V)
Figure 1
Ambient temperature vs.Input
threshold voltage variation ratio
30
10 Vcc=2V
5
0
-5
-10
-15
-25 0 25 50 75 100
Ambient Temperature Ta (℃)
Figure 3
OCP3601
Step-Up DC/DC Controller
Supply voltage vs. Input threshold voltage
1.2
Ta=25℃
1.0
0.8
0.6
0.4
0.2
0 4 8 12 16 20
Supply voltage Vcc (V)
Figure 2
Page5 - 17
Rev. 1.1 Sep 26, 2005
Free Datasheet http://www.Datasheet4U.com
5 Page 
OCP3601
Step-Up DC/DC Controller
Output transistor
The OCP3601 has a totem-pole transistor with a 40 mA source/sink current rating to drive an external NPN transistor
or NMOS transistor directly. The driving current capability depends on a resistor R that is connected to BR/CTL pin
(pin4) of OCP3601. (see fig.13)
Control
OCP3601
4
BR/CTL
R
Q1
Figure13. Output transistor driving control circuit
BR/CTL pin can also use to control the output of OCP3601 for disable or enable function of system.
Control Pin
Low
High
Q1
Off
On
BR/CTL Pin
Open
Bias Current
Output Transistor Function
Disable
Enable
Mode
Stand-by
Operation
Page11 - 17
Rev. 1.1 Sep 26, 2005
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet OCP3601.PDF ] | |
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