ep5368 Enpirion, ep5368 Datasheet

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ep5368

Manufacturer Part Number
ep5368
Description
600ma Synchronous Buck Regulator With Integrated Inductor
Manufacturer
Enpirion
Datasheet

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Featuring Integrated Inductor Technology
Product Highlights
• Integrated Inductor
• 3mm x 3mm x 1.1mm QFN package
• Only two low cost MLCC caps required
• 4 MHz switching frequency
• High efficiency, up to 94%
• Up to 700mA continuous output current
• Wide 2.4V to 5.5V input range
• V
• 100% duty cycle capable
• Less than 1 µA standby current
• Low V
• Short circuit and over current protection
• UVLO and thermal protection
• RoHS compliant; MSL 3 260°C reflow
Typical Application Circuit
Figure 1. Typical application circuit.
Stable over entire operating range
OUT
V
Range 0.603V to V
IN
OUT
Voltage
4.7µF
0603
Select
ripple for RF compatibility
V
V
V
ENABLE
S0
S1
S2
V
in
EP5368QI
GND
V
IN
Sense
V
V
out
FB
– 0.4V
22µF
0805
V
OUT
600mA Synchronous Buck Regulator
Product Overview
The
converter
controller,
providing the smallest possible solution size.
The EP5368QI requires only two small MLCC
capacitors to make a complete solution.
Integration of the inductor greatly simplifies
design, contains noise, reduces part count, and
reduces solution footprint. Low output ripple
ensures compatibility with RF systems.
The
frequency
unprecedented level of integration and small
external components. Type III voltage mode
control is used to provide high noise immunity
and wide control loop bandwidth.
is stable over all input and output voltages . It
can source 600mA of current over the
industrial temperature range and up to 700mA
over the commercial temperature range.
The small footprint makes this part ideal for
space
Shutdown current of <1uA extends battery life
Output voltage level is programmed via a 3-pin
VID selector providing seven pre-programmed
output voltages along with an option for
external resistor divider.
Applications
• Noise sensitive RF applications
• Area constrained applications
• Smart phones and PDAs
• Portable gaming devices
• Personal Media Players
• Advanced Mobile Processors, DSP, IO,
Memory, Video, Multimedia Engines
EP5368QI
EP5368QI
constrained
3mm x 3mm x 1.1mm Package
with
MOSFETS,
of
With Integrated Inductor
integrated
4
operates
is
MHz,
a
portable
EP5368QI
and
synchronous
at
Inductor,
RoHS Compliant
Halogen Free
enabling
Compensation
a
applications.
The device
switching
April 2008
PWM
buck
this

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ep5368 Summary of contents

Page 1

... Product Overview The converter controller, providing the smallest possible solution size. The EP5368QI requires only two small MLCC capacitors to make a complete solution. Integration of the inductor greatly simplifies design, contains noise, reduces part count, and reduces solution footprint. Low output ripple ensures compatibility with RF systems. ...

Page 2

... April 2008 Pin Description Figure 2. EP5368QI Package Pin-out. NC (Pins 1,3,9,15,16): These pins should not be electrically connected to each other or to any external signal, voltage, or ground. One or more of these pins may be connected internally. PGND: (Pin 2): Power ground. (Pin 4): Feed back pin for external divider ...

Page 3

... ENABLE Soft Start (-) PWM Comp (+) Sawtooth Generator Figure 3. Functional block diagram. ©Enpirion 2008 all rights reserved, E&OE P-Drive Logic N-Drive Compensation Network (-) Error Amp (+) DAC VREF VS0 VS1 VS2 3 EP5368QI V IN NC(SW) V OUT GND V SENSE Switch V FB Voltage Select Package Boundry www.enpirion.com ...

Page 4

... A T -40 +125 J SYMBOL TYP θ 100 JA T +150 J- 25° 3.6V MIN TYP 2.4 V out 3.3 2.5 1.8 1.5 1.25 1.2 0.8 ext. 0.6 V 1.5 600 700 0.75 ≤ 3.3V 1 www.enpirion.com EP5368QI UNITS °C °C V UNITS V °C °C UNITS °C/W °C °C MAX UNITS 5 -0 mV/µ µA A ...

Page 5

... T ≤ +85°CV (all causes) A 2.4V ≤ V ≤ 5. ≤ I ≤ 700mA LOAD Vout = 3.3V ss 100 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 Efficiency, V Transient EP5368QI MIN TYP MAX 0.603 100 0.0 0.4 1 340 270 -2% +2% -3% +3% 0.0566 0.0003 1.5 2.2 Load Current (A) = 3.7V 1.2V, 1.5V,1.8V, 2.5V IN OUT = 3.6V ...

Page 6

... OUT Detailed Description ©Enpirion 2008 all rights reserved, E&OE Shutdown 3.6V 1.5V, Load = 500mA IN OUT Voltage Ripple 3.3V 22uF 0805, 2.0mV/Div. OUT Voltage Ripple 3.3V 10uF 0805, 2.0mV/Div. OUT 6 EP5368QI = 1.8V, Load = 600mA OUT = 1.8V, Load = 600mA OUT www.enpirion.com ...

Page 7

... Stable Over Wide Range of Operating Conditions MOSFET The EP5368QI utilizes an internal type III compensation network and is designed to provide a high degree of stability over a wide range of operating conditions. operates over the entire input and output voltage range with no external modifications required ...

Page 8

... Hysteresis is included to prevent chattering between states. Application Information Output Voltage Select To provide the highest degree of flexibility in choosing output voltage, the EP5368QI uses a 3 pin VID, or Voltage ID, output voltage select arrangement. This allows the designer to choose one of seven preset voltages use an external voltage divider ...

Page 9

... April 2008 External Voltage Divider As described above, the external voltage divider option is chosen by connecting the VS0, VS1, and VS2 pins to VIN or logic “high”. The EP5368QI uses a separate feedback pin when using the external divider. VSENSE FB must be connected to V OUT Figure 4. ...

Page 10

... Ca = 15pF 0402 MLCC capacitor. Then R is given as 501 Ω R − 603 OUT Recommended PCB Footprint ©Enpirion 2008 all rights reserved, E&OE V can be programmed over the range of OUT 0.603V to V -0.4V. IN Stability cannot be assured if these guidelines are not followed. 10 EP5368QI www.enpirion.com ...

Page 11

... April 2008 Package Dimensions ©Enpirion 2008 all rights reserved, E&OE 11 EP5368QI www.enpirion.com ...

Page 12

... Enpirion assumes no responsibility for its use or for infringement of patents or other third party rights, which may result from its use. Enpirion products are not authorized for use in nuclear control systems, as critical components in life support systems or equipment used in hazardous environment without the express written authority from Enpirion. ©Enpirion 2008 all rights reserved, E&OE 12 EP5368QI www.enpirion.com ...

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