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PT1101E23E-10 Datasheet Preview

PT1101E23E-10 Datasheet

PWM/VFM Step-down DC-DC Controller

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PT1101E23E-10 pdf
PT1101
PWM/VFM Step-down DC-DC Controller
ƒ GENERAL DESCRIPTION
The PT1101 Series are CMOS-based PWM step-down DC/DC Controllers with low supply current. A low ripple, high
efficiency step-down DC/DC converter can be easily composed of with additional several external components such as a
power-transistor, an inductor, a diode and capacitors. Output voltage is fixed or can be adjusted with external resisters.
(PWM/VFM alternative circuit is disabled in adjustable types)
The PT1101 Series consist of a PWM control circuit, a high precision band-gap voltage reference, a soft-start circuit, a
protection circuit, a PWM/VFM alternative circuit, an oscillator, an error amplifier with internal compensation network and
input/output voltage detection circuits.
With its internal state-of-art control algorithm, the PT1101 Series based DC/DC converter can achieve high performance
while maintaining stability. For example, with its PWM/VFM alternative circuit, when the load current is small, the operation
is automatically switched into the VFM mode to improve the efficiency. Further, if the term of maximum duty cycle keeps on
a certain time, the embedded protection circuits restart the operation with soft-start and repeat until the maximum duty
cycle condition is released. Finally, built-in UVLO function blocks potentially unstable output when the input voltage is equal
or less than UVLO threshold and makes this IC standby for low power consumption.
ƒ FEATURES
ƒ APPLICATIONS
„ Wide Range Of Input Voltage: 2.3V~18V
„ Built-in Soft-start and Protection Function
„ High Efficiency: Typ. 90%
„ Oscillation Frequency: 500kHz
„ High Accuracy Output Voltage: ±2%
„ Low Temperature Coefficient of Output Voltage:
Typ. ±100ppm/
„ Standby Current: Typ. 0.1µA
„ Output Voltage: Stepwise Setting with a step of
0.1V in the range of 1.2V to 6.0V as fixed voltage
type. Reference Voltage of Adjustable type is 1.0V.
„ CMOS Output Capability
„ Small Package: SOT-23-5
Power Sources For:
„ Hand-held communication equipment, cameras,
video instruments such as VCRs, camcorders
„ Battery-powered equipment
„ Household electrical appliances
ƒ ORDERING INFORMATION
Package
SOT-23-5,
Pb-free
Temperature Range
-40to 125
Ordering Part Number
PT1101E23E-10 (Adjustable Output Voltage)
PT1101E23E-33 (3.3V Output Voltage)
PT1101E23E-50 (5.03V Output Voltage)
Transport
Tape and Reel
Tape and Reel
Tape and Reel
Marking
1101
1101C
1101D
Datasheet Rev 1.0, China Resources Powtech (Shanghai) Limited
Page 1



PowTech
PowTech

PT1101E23E-10 Datasheet Preview

PT1101E23E-10 Datasheet

PWM/VFM Step-down DC-DC Controller

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PT1101E23E-10 pdf
PT1101
PWM/VFM Step-down DC-DC Controller
ƒ TYPICAL APPLICATION CIRCUIT
” Fixed Output Voltage Type
PMOS: IRF7406 (IR)
C3: 47µF, Tantalum Type
R1: 10
L: CR105-270MC (Sumida, 27µH)
C1: 10µF, Ceramic Type
SD1: RB063L-30(Rohm)
C2: 0.1µF, Ceramic Type
” Adjustable Output Voltage Type. For example, Output Voltage=3.2V
PMOS: IRF7406 (IR)
C3: 47µF, Tantalum Type
C4: 1000pF, Ceramic Type
R3: 2.7 k
L: CR105-270MC (Sumida, 27µH)
C1: 10µF, Ceramic Type
R1: 10
R4: 22 k
SD1: RB063L-30(Rohm)
C2: 0.1µF, Ceramic Type
R2: 10k
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Datasheet Rev 1.0, China Resources Powtech (Shanghai) Limited
Page 2


Part Number PT1101E23E-10
Description PWM/VFM Step-down DC-DC Controller
Maker PowTech
Total Page 10 Pages
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