PE2118 Datasheet PDF - Zetex

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PE2118
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Part Number PE2118
Description Synchronous Boost DC/DC Regulator
Page 9 Pages


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PE2118
Synchronous Boost DC/DC Regulator PE2118
Features
Description
Up to 96% Efficiency
Low voltage start-up 0.9V
Shut-down current: < 1 A
Input voltage 0.6V 4.4V
Output voltage 2.5V 4.3V (Up to 5V
with Schottky)
Low switch on resistance RDS(ON),
Internal switch: 0.35
1.4MHz fixed frequency switching
High switch on current: 1A
Short-Circuit protection
Low profile SOT-23-6 package (lead-free
packaging is now available)
Applications
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handsets and DSL modems
PC cards
Portable media players
The PE2118 is high efficiency synchronous,
PWM step-up DC/DC converters optimized
to provide a high efficient solution to
medium power systems. The devices work
under the input voltage between 0.6V and
4.4V with a 1.4MHz fixed frequency
switching. These features minimize overall
solution footprint by allowing the use of tiny,
low profile inductors and ceramic
capacitors.
The PE2118 is capable of supplying an
output voltage between 2.5V and 4.3V, the
internal synchronous switch is desired to
provide high efficiency without Schottky.
The devices also featured providing up to
260mA from a single AA cell input or up to
600mA from a 2-cell AA with a 3V/3.3V
output.
The PE2118 regulators are available in the
industry standard SOT-23-6 power packages
(or upon request).
Order Information
PE2118
:
SYMBOL
DESCRIPTION
Denotes Output voltage:
A : Adjustable Output
Denotes Package Types:
F: SOT-23-6
-1-
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PE2118
Typical Application
Pin Assignment
654
123
SOT-23-6
PIN NUMBER
SOT-23-6
1
2
3
4
5
6
PIN NAME
SW
GND
FB
EN
VOUT
VIN
FUNCTION
Switch Output
Ground
Feedback
ON/OFF Control
(High Enable)
Output
Input
-2-
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PE2118
Functional Diagram
Absolute Maximum Ratings
Power Dissipation………………………………………...Internally limited
VIN ……………………………………………………………..- 0.3 V + 6 V
VOUT…………………………………………………………....- 0.3 V + 6 V
VSW …….………………………………………………………- 0.3 V + 6 V
VEN, VOUT………………………………………………………- 0.3 V + 6 V
Operating Temperature Range …………………………- 30
+ 85
Lead Temperature (Soldering 10 sec.) ……………………………+ 300
Storage Temperature Range …………………………..- 65
+ 125
-3-
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PE2118
Electrical Characteristics
Operating Conditions: TA=25 , VIN=1.2V, VOUT=3.3V unless otherwise specified.
PARAMETER
Output Voltage Range (Adj.)
Minimum Start-Up Voltage
Minimum Operating Voltage
Switching Frequency
Max Duty Cycle
Current Limit Delay to Output
Feedback Voltage
Feedback Input Current
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Current Limit
Quiescent Current (Active)
Shutdown Current
En Input High
En Input Low
En Input Current
CONDITIONS
ILOAD = 1mA
EN = VIN
VFB = 1.15V
VFB = 1.22V
VSW = 5V
VSW = 0V
VOUT = 3.3V
VOUT = 3.3V
Measured On VOUT, Nonswitching
VEN=0V, Including Switch Leakage
VEN = 5.5V
MIN TYP MAX UNITS
2.5 5 V
0.9 1.1
V
0.6 0.75
V
1.1 1.4 1.7 MHz
80 87
%
40 ns
1.165 1.203 1.241
V
1 nA
0.1 5
A
0.1 5
A
0.35
0.45
700 950
mA
300 500
0.1 1
A
A
1
0.35
0.01 1
V
V
A
-4-
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