PS0100
600mA Synchronous Boost
Converter with Output Disconnect
FEATURES
Up to 92% efficiency
Low start-up voltage 0.8V
Internal synchronous rectifier
Up to 2MHz switching allows for tiny
external components
0.5V to 4.4V input range
2.5V to 5.0V output range (Note 3)
Fully discharged shutdown output voltage
Logic controlled shutdown (<1µA)
Low 250µA operating supply current
(measured at VOUT)
Pulse skipping at light load for extended
battery life
Generates 3.3V at 100mA from single AA
cell
Stable with ceramic output capacitor
Low profile 6-Leads SOT-26 package
MP3 / MP4 players
PDAs and organizers
Digital cameras
Wireless mice/ keyboards
Portable medical equipment
Cordless phones
Wireless Headsets
The PS0100 is a synchronous, step-up DC/DC
converter delivering high efficiency in a SOT-26
package. The device has an internal NMOS switch
and PMOS synchronous rectifier and has the
capacity of supplying 3.3V at 100mA from a single
AA cell input.
High frequency switching (up to 2MHz) minimizes
the board area by allowing the use of tiny, low
profile inductors and ceramic capacitors.
The PS0100 provides automatic pulse skipping at
light loads, thus reducing the supply current for
extended battery life. At shutdown, the PS0100
fully discharges the output to ground and draws no
supply current.
The PS0100 is available in small SOT-26 package
with both fixed and adjustable output voltage
versions.
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
July 2007
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1
PS0100
PIN CONFIGURATION
PIN DESIGNATOR
Name Pin
SW
1
GND
2
FB
3
SHUTB 4
VOUT
5
VIN
6
Type
Switch
Ground
Feedback
Shutdown input
Analog output
Battery input
Function
Connects inductor between SW and VIN
Ground pin
Adjustable feedback input, connects to resistor voltage divider
SHUTB = High: normal operation (Supports both TTL and CMOS logic)
Boost regulator output
Boost regulator input
ORDERING INFORMATION
Part Number
PS0100A
PS0100 – 2.5
PS0100 – 2.8
PS0100 – 3.0
PS0100 – 3.3
Voltage
Adj.
2.5
2.8
3.0
3.3
Junction Temperature Range
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
Package
SOT-26
SOT-26
SOT-26
SOT-26
SOT-26
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2
PS0100
BLOCK DIAGRAM
SW
VIN
Discharge Switch
Body Manage Switch
VOUT
Current Sense
Amplifier
Bias
Select
Bias to all
Circuitry
+
-
Zero-Current
Ref
+
Thermal
Sensor
Program Voltage
+ -
-
Zero Crossing
Comparator
+
-
Gate Control
Logic
Fixed T
ON
Over-Current
Limiter
Start-up
Oscillator
UVLOB
Under Voltage
Lockout
REFERENCE
REF
Time Control
Logic
Minimum
T
OFF
+
_
FB
SHUTB
Shut-Down
Circuitry
Shut Down
GND
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PS0100
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
SW
V
SHUTB
V
FB
V
OUT
I
SW,
I
OUT,
I
GND
T
STG
R
θJA
T
A, MAX
T
L
ESD
Parameter
DC Supply Voltage at Pin 6
SW Voltage - DC
SW Voltage–Pulsed (<100nS)
SHUTB Voltage
FB Voltage
Output Voltage
Switch Current
Storage Temperature Range
Thermal Resistance, Junction-To-Air
Operating Temperature Range (Note 4)
Lead Temperature (Soldering, 10sec)
ESD Capability, HBM model
Value
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 7.0
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
0 to 1A
-65 to +125
N/A
-40 to +85
260
2.0
Unit
V
V
V
V
V
V
A
°C
°C/W
°C
°C
KV
ELECTRICAL CHARACTERISTICS
(All specifications are at T
A
= 25°C, V
IN
= 1.5V, V
OUT
= 3.3V, V
SHUTB
= 1.5V, unless otherwise specified.)
Parameter
Minimum Start-Up Voltage
Minimum Operating Voltage
Maximum Input Operating
Voltage
Output Voltage Adjust Range
Feedback Voltage
Feedback Input Current
Load Regulation
Quiescent Current
(No-Switching)
Quiescent Current (Shut-down)
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Current Limit
PMOS Turn-Off Current
Current Limit Delay to Output
Minimum Off-Time
Maximum On-Time
Maximum On-Time to Minimum
Off-Time Ratio
Conditions
No load
Note 1
Note 2
Note 3
T
A
= -40°C to 85°C (Note 4)
V
FB
= 1.2V
I
LOAD
= 10mA to 100mA
V
FB
= 1.2V, measured at VOUT
V
SHUTB
= 0V, V
OUT
= 0V, including
switch leakage
V
OUT
= 3.3V
V
OUT
= 3.3V
600
50
100
0.13
0.95
7.3
Min
Typ
0.8
0.5
4.4
Max
0.95
Unit
V
V
V
V
V
nA
%
µA
µA
Ω
Ω
mA
mA
nS
µS
µS
2.5
0.97
1.0
1
2.2
250
0.01
0.45
0.6
5.0
1.03
420
1
V
IN
= 0.5V
V
FB
= 0.95V, V
IN
= 0.5V,
T
A
= -40°C to 85°C (Note 4)
0.6
4
1.4
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4
PS0100
ELECTRICAL CHARACTERISTICS (continued)
(All specifications are at T
A
= 25°C, V
IN
= 1.5V, V
OUT
= 3.3V, V
SHUTB
= 1.5V, unless otherwise specified.)
Parameter
SHUTB Input High
SHUTB Input Low
SHUTB Input Current
Frequency at Start-Up
Thermal Shutdown
Conditions
Min
0.95
Type
Max
0.35
100
15°C Hysteresis
650
145
Unit
V
V
nA
KHz
°C
Note 1:
Minimum operating input voltage is fixed by the battery’s ability to provide necessary power at that
(terminal) voltage. Below this voltage, the battery fails to deliver required power as it enters into deeply
discharged state. This voltage can be lower if the required duty cycle is less.
Note 2:
When the input voltage is greater than the output voltage regulation point, the part operates in track
mode (see Track Mode).
Note 3:
For applications where V
OUT
> 4.3V, an external Schottky diode is recommended.
Note 4:
Limits are 100% production tested at T
A
=25°C. Specifications over the -40°C to +85°C operating
temperature range are assured by design.
July 2007
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© 2007 Power IC. All Rights Reserved.
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