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RZ1515 Schematic ( PDF Datasheet ) - Wuxi Microelectronics

Teilenummer RZ1515
Beschreibung PWM Control 5A Step-Down Converter
Hersteller Wuxi Microelectronics
Logo Wuxi Microelectronics Logo 




Gesamt 6 Seiten
RZ1515 Datasheet, Funktion
Features
- Input voltage: 3.6V to 20V.
- Output voltage: 0.8V to VCC.
- Duty ratio: 0% to 100% PWM control
- Oscillation frequency: 300KHz typ.
- Soft-start, Current Limit, Enable function
- Thermal Shutdown function
- Built-in internal SW P-channel MOS
- SOP8 Pb-Free Package.
Applications
- PC Motherboard
- LCD Monitor
- Graphic Card
- DVD-Video Player
- Telecom Equipment
- ADSL Modem
- Printer and other Peripheral Equipment
- Microprocessor core supply
- Networking power supply
Pin Assignments
FB 1
8 Vss
EN 2
OCSET 3
RZ1515
7 Vss
6 Output
Vcc 4
5 Output
RZ1515
PWM Control 5A Step-Down Converter
General Description
RZ1515 consists of step-down switching regulator
with PWM control. These devices include a
reference voltage source, oscillation circuit, error
amplifier, internal PMOS and etc.
RZ1515 provides low-ripple power, high
efficiency,and excellent transient characteristics.
The PWM control circuit is able to vary the duty
ratio linearly from 0 up to 100%. This converter
also contains an error amplifier circuit as well as a
soft-start circuit that prevents overshoot at startup.
An enable function, an over current protect
function and a short circuit protect function are
built inside, and when OCP or SCP happens, the
operation frequency will be reduced from 300KHz
to 50KHz. Also, an internal compensation block is
built in to minimum external component count.
With the addition of an internal P-channel Power
MOS, a coil, capacitors, and a diode connected
externally, these ICs can function as step-down
switching regulators. They serve as ideal power
supply units for portable devices when coupled
with the SOP8 mini-package, providing such
outstanding features as low current consumption.
Since this converter can accommodate an input
voltage up to 20V, it is also suitable for the
operation via an AC adapter.
Pin Descriptions
Name
FB
EN
OCSET
VCC
Output
Vss
Pin
1
2
3
4
56
78
Description
Feedback pin.
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation
stopped
(All circuits deactivated)
Add an external resistor to set
max output current.
IC power supply pin
Switch Pin. Connect external
inductor/diode here. Minimize
trace area at this pin to reduce
EMI.
GND Pin
Tel. 0510-85898501 18061979821 Fax. 0510-85898500
1/6 Rev. 1.0 2009-10






RZ1515 Datasheet, Funktion
Package Information
Package Type SOP8
RZ1515
PWM Control 5A Step-Down Converter
Tel. 0510-85898501 18061979821 Fax. 0510-85898500
6/6 Rev. 1.0 2009-10

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