Step-Up DC-DC Converter and Controller  
Step-Up DC-DC Converter 
Part No. Features VIN(Range)(V) η() IO(mA) IQ(uA) Package
UC3506* 1V High Efficiency Synchronous Step-Up Converters  0.6V~5.5V Up to 92% 1000mA 18uA TSSOP-8
UC8383-XX 165KHz VFM Step-Up DC-DC Converters

* 0.8V Start-Up Voltage
* Output Voltage Accuracy ±2%
* Low Ripple and Low Noise
* High Efficiency Up to 85%
* Low Profile and Minimum External Components
0.8V ~ 5.5V Up to 85% Up to 100mA 18uA SOT-89
UC3383-XX PFM Controlled,Step-Up DC-DC Converters with Enable Function

* Highly Accurate: Set-up Voltage ±2.5%
* Variable Duty Ratio: 45%/75% (±5%)
* Both Switching Transistor Built-in and External Types are  vailable
0.9V ~ 10.0V Up to 85% Up to 50mA 5.3uA SOT-25 SOT-89
UC3382-XX* PWM/PFM Controlled,Step-Up DC-DC Converters and controller 0.9V~10.0V  85%(Typ) Up to 100mA 5uA SOT-25 SOT-89 SOT-89-5
UC3553-XX* High Efficiency Synchronous Step-Up DC-DC Converters
(Vout=1.8V~5.5V)
1.1V~5.5V Up to 92% Up to 300mA 20uA MSOP-8
LT1304 MICROPOWER DC/DC CONVERTERS WITH LOW-BATTERY DETECTOR ACTIVE IN SHUTDOWN 1.5V~6.5V - - - DIP-8 SOP-8
UC2306-XX DC-DC Converters with Low-Battery Detector Active in Shutdown

*In shutdown mode:10μA quiescent current.
*Low battery detector active
*Only by one resistor: peak current is programmable.
1.5V ~ 8.0V Up to 85% 1000mA 120uA SOP-8 DIP-8
UC3555 500mA PFM Synchronous Step-Up DC-DC Converters and Controller

* Low power PFM step-up DC/DC
* internal synchronous rectifier
* Low battery detection
* Current limited protection
* Current Anti-Drawback protection
1.6V~4.5V  95%(Typ) Up to 500mA 80uA TSSOP-8
UC3551-XX 450KHz ADVANCED PWM STEP-UP DC-DC CONVERTER

* Low Start-up Input Voltage is as Low as 1.0V
* Efficiency up to 90%
* Zero Shutdown Mode Supply Current
* Both Internal and External Power Switches for Maximum Flexibility
2.0V~6.5V Up to 90% Up to 300mA 17uA SOT-26
UC3500-XX 150KHz Max VFM Step-Up DC-DC Converters (VO=2.5V~5V)

* 0.8V start-up voltage
* 0.5V hold-on voltage
* Low supply current of 18μA
* High efficiency up to 88%
* Low profile and minimum external components
0.7V~7.0V  88%(Typ) Up to 150mA 18uA SOT-25 SOT-23 SOT-89
P2172 100kHz, 1.25A High Efficiency Switching Regulators

* Very Few External Parts Required
* Self-Protected Against Overloads
* Operates in Nearly All Switching Topologies
* Flyback-Regulated Mode Has Fully Floating Outputs
* Can Be Externally Synchronized
3.0V~60.0V  80%(Typ) 1.25A 6mA DIP-8
UU28121 1.2MHz, 1.2A BOOST FOR WHITE LED DRIVER

* Internal Soft-start Function
* Current limit and Thermal shutdown protection
* Under voltage Lockout
2.5V~5.5V - 1.2A 250uA SOT-25
UU28141 1MHz, 1.4A BOOST FOR WHITE LED DRIVER

* Drives up to 8 series White LEDs
* Wide range for PWM dimming (200Hz~200KHz)
* Over Voltage Protection (OVP)
* Internal Soft-start Function
* Current limit and Thermal shutdown protection
* Under voltage Lockout
2.5V~5.5V - 1.4A 400uA SOT-26
*: Under  Development
Step-Up PWM DC-DC Controller  
Part No. Features VIN(Range)(V) η() IO(mA) IQ(uA) Package
UC3380 PWM/PFM Step -Up Switching Regulator Controller(VO=1.8V~5.0V)

* 0.5uA Low Shutdown Current
* Fix Frequency PWM at 300KHZ
* Built in PWM Switching Control Circuit ,Duty Ratio is 0~78%
* Soft Start Time: 3ms
* Shutdown Function
0.9V~10.0V 86% 80mA 0.5uA SOT-25
UC3550 300KHz PWM Step-Up DC-DC Controller(VO=3.3V~5.0V)

* Output Voltage Range1.8~6V Programmable in 0.1V with high accuracy ± 2.5%
* High Efficiency 88% (Typ.)
* Low Start-up Voltage of 0.9V Typical at IOUT = 1.0mA
* Chip Enable Pin with Pull-up Current Source
0.9V~8.0V 88% 150mA <200uA SOT-25
UC3552 PWM DC-DC CONVERTER WITH INTERNAL SWITCH AND SOFT-START

* 1.6A, 0.23Ω, internal switch
* High efficiency: 90%
* Adjustable frequency: 640kHz or 1.3MHz
* Low shutdown current: 0.1μA
* Programmable soft-start
2.6V~5.5V 90% 1600mA 1200uA MSOP-8 SOP-8
UC33063A DC TO DC CONVERTER CONTROLLER

* Short Circuit Current Limiting.
* Low Standby Current.
* Frequency of Operation from 100Hz to 100kHz.
* Step-up, Step-down or Inverting Switch Regulators.
3.0V~40V - 1500mA - DIP-8 SOP-8
UC34163 DC TO DC CONVERTER CONTROLLER

* Low standby current.
* Frequency of operation from 100Hz ~ 100kHz.
* Step-down switch regulators.
35V - 1500mA - DIP-8 SOP-8
UD06121 * Input Voltage Range :2.5V~5.5V
* Output Voltage: from 0.6V to VIN
* High Efficiency: Up to 92%
* Constant Frequency Operation:1.4MHz
* Output Current:1.2A
* Quiescent Current: 200μA (input < 4.2V)
* No Schottky Diode Required
* 100% Duty Cycle in Dropout
* 0.6V Reference Allows Low Output Voltages
* Current Mode Operation for Excellent Line and Load Transient
Response
* Current limit, Enable function
* Short Circuit Protect (SCP)
* 1μA Shutdown Current
2.5V~5.5V 92% 1600mA 400uA SOT-25
UD06122 1.2A 1.5MHz dual high-efficiency(PWM) step-down DC-DC converter

* Stable with Low ESR Output Ceramic Capacitors
* Up to 95% Efficiency
* Less than 1μA Shutdown Current
* Thermal Shutdown Protection
* Current limit and short circuit protections.
* Build-in soft start function
2.5V~6.0V 95% 1200mA 350uA DFN3030-10
UD05123 1.2A 2.25MHz constant frequency current mode PWM step-down converter

* High Efficiency: Up to 92%
* 100% Duty Cycle in Dropout
* Current limit, Enable function
* Short Circuit Protect (SCP)
* 1μA Shutdown Current
2.5V~5.5V 92% 1200mA 90uA SOT-25
*: Under  Development
DC-DC Converter(Step-Down /Step-Up)  
Part No. Features VIN(Range)(V) η() ICC ISW(A) Package
PD(mW)
MC3063 * MAX. 40V Input
* MAX. load to 1.5A
* Output Voltage Adjustable
* Frequency Operation of 150kHz
* Precision 1.5% Reference
0V~40.0V - 7.0mA 1.5A SOP-8
-
3563 High-Efficiency DC-DC Converter

* Bootstrapped driver.
* High side current sense capability.
* High efficiency (up to 90%)
* Internal ±2% reference.
* Frequency operation from 100Hz to 100KHz
3.0V~30.0V 90% 1.6mA 1.5A DIP-8  SOP-8
1000/625mW
MC34063A Variable Frequency DC-DC Converter Controller IC
for Step-Up or Step-Down Voltage Converter

* Short circuit current limiting.
* Low standby current.
* Frequency of operation from 100Hz to 100kHz.
* Step-up, step-down or inverting switch regulators.
3.0V~40.0V 88% 2.7mA 1.5A DIP-8  SOP-8 TSSOP-8
1250/625mW/300mW
MC33167* 5A DC-DC Converter with Standby Mode
Step-Up or Step-Down or Inverse
7.5V~40.0V 80% 40mA Op
36uA stby
5.0A TO-252-5 TO-263-5 TO-220-5
-
*: Under  Development