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PS7516 Datasheet Preview

PS7516 Datasheet

current mode PWM boost DC/DC converter

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PS7516
Wide Input Voltage Range: 2 5V to 5.5V
Description
The PS7516 is a high efficiency, fixed frequency
1MHz, current mode PWM boost DC/DC converter
which could operate battery such as input voltage
down to 1.9V. The converter output voltage can be
adjusted to a maximum of 5.25V by an external
resistor divider. Besides the converter includes a
0.08Ω N-channel MOSFET switch and 0.12Ω
P-channel synchronous rectifier. So no external
Schottky diode is required and could get better
efficiency near 936%.
The converter is based on a fixed frequency, current
mode, pulse-width-modulation PWM controller that
goes automatically into PSM mode at light load.
When converter operation into discontinuous mode,
the internal anti-ringing switch will reduce
interference and radiated electromagnetic energy.
The PS7516 is available in a space-saving SOT-23-6
package for portable application.
Features
High Efficiency up to 96% (When Vin = 4.2V)
Low RDS(ON) Integrated Power MOSFET
NMOS 80mΩ / PMOS120mΩ
Wide Input Voltage Range: 1.9V to 5.5V
Fixed 1MHz Switching Frequency
Low-Power Mode for Light Load Conditions
±2.0% Voltage Reference Accuracy
PMOS Current Limit for Short Circuit Protection
Low Quiescent Current
Output Ripple under 200mV. (Scope Full
Bandwidth)
Fast Transient Response
Built-In Soft Start Function
Over-Temperature Protection with Auto Recovery
Output Overvoltage Protection
Space-Saving SOT-23-6 Package
Applications
Portable Power Bank
Wireless Equipment
Handheld Instrument
GPS Receiver
Pin Assignments
SOT23- 6
-
IN OUT EN
654
123
LX GND FB
Figure 1. Pin Assignment of PS7516
Functional Pin Description
Pin Name
LX
GND
FB
EN
Pin No.
1
2
3
4
Pin Function
Power Switching Connection. Connect LX to the inductor and output rectifier.
Ground Pin.
Voltage Feedback Input Pin.
Logic Controlled Shutdown Input.
OUT
ININ
5 Output of the Synchronous Rectifier.
6 Power Supply Input Pin.
1




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PS7516 Datasheet Preview

PS7516 Datasheet

current mode PWM boost DC/DC converter

No Preview Available !

PS7516
.
85T
Block Diagram
VIN
LX
EN
On/Off
Control
ANTI-RING
PMOS
NMOS
PFM
Control
OSC
OVP
UVLO
VIN
PWM
Control
Logic
OTP
Isense/Current Limit
Slope Comp.
COMP
Body-Diode
Switch
Anti-Reverse
Comparator
Error
Amp
Bandgap
Reference
GND
Figure 3. Block Diagram of PS7516
OUT
FB
85T
2


Part Number PS7516
Description current mode PWM boost DC/DC converter
Maker ETC
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PS7516 Datasheet PDF






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