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YB1300
Regulated Charge Pump 5V 100mA
Description
The YB1300 is a switched capacitor DC/DC step up converter that produces a regulated 5V output. The input voltage range is from 2.7V to 5.0V that makes the YB1300 ideally for a single cell Li-Ion battery source. The YB1300 works well for step-up applications without the need for an inductor. The 1MHz switching frequency allows the use of small SMD capacitors. The YB1300 provides thermal protection, short-circuit current limit protection. In order to prevent in-rush current effectively, it provides automatic soft-start. The quiescent current is 30A without load and its shutdown current is less than 0.1A. The YB1300 is available in a 6-pin SOT23 package.
Features
Switched-Capacitor Step-Up Operation Input Range : 2.7V to 5.0V Output Voltage : 5V Output Current : 2.7V VIN 3.2V, IOUT 30mA Output Current :3.2V VIN 5V, IOUT 100mA Shutdown Mode Low Quiescent Current : ~30A 1MHz Internal Oscillator Thermal Protection Shutdown Output Short-circuit Current Limit Protection Automatic Soft-Start Reduces In-Rush Current SOT23-6 Package
Applications
Cellular Phones White LED Drivers Smart Card Reader PCMCIA Cards Li-Ion Battery Backup Supplies
Typical Application Circuit
5
1-Cell Li-Ion-Battery CIN 2.2uF
VIN
YB1300 1 VOUT CP 6 4
CPUMP 0.22uF R COUT 2.2uF R R R R
3
EN
2
GND
CN
Figure 1. Typical application circuit
YB1300 MRev.1.2
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YB1300
Regulated Charge Pump 5V 100mA
Pin Configuration
SOT23-6
TOP VIEW
VOUT 1 6 CP
Y13C
GND 2 EN 3
5 VIN 4 CN
Figure 2. Pin configuration
Pin Description
Table 1
Pin 1 2 3 4 5 6
Name VOUT GND EN CN VIN CP
Description Regulated output voltage. VOUT should be bypassed with a low ESR capacitor for the best performance. Ground pin. 3V or above will turn on the IC. Below 0.4V will put the chip in the shutdown mode. Pumping capacitor negative terminal. Input supply voltage. VIN should be bypassed with a 2.2F low ESR capacitor. Pumping capacitor positive terminal.
Ordering Information
Order Number YB1300 Package Type SOT23-6 Supplied as 3000 units Tape & Reel Package Marking Y13C
YB1300 MRev.1.2
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YB1300
Regulated Charge Pump 5V 100mA
Absolute Maximum Ratings
Supply Voltage......................................................5.5V Output Voltage ......................................................5.5V Output Short-Circuit Duration ....................Continuous Junction Temperature Range........................... +125 Storage Temperature Range ............. -65 to +150 Lead Temperature............................................ +250
Recommended Operating Conditions
Input Supply Voltage................................... 2V to 5V Operating Temperature..................... -40 to +85
Electrical Characteristics
At TA=25 Table 2 , VIN=3.2V, IOUT=10mA, CIN=COUT=2.2F, CPUMP=0.22F, VENABLE=VIN, unless otherwise noted.
Symbol VIN VOUT IOUT ISC FOSC VR VIH VIL TST TRT IQC ISD Note:
Function Parameter Input Voltage Output Voltage Output Current Output Current (short-circuit) Oscillator Frequency Efficiency Ripple Voltage Enable Control (High) Enable Control (Low) Thermal Shutdown Thermal Recovery Supply Current (Quiescent) Supply Current (Shutdown) 2.7V 3.2V
Test Conditions
Min 2.7
Typ
Max 5.0
Units V V V mA mA MHz % mVpp
VIN 3.2V, IOUT VIN 5V, IOUT
30mA 100mA
4.7 4.7
5.0 5.0 100 210 1
5.3 5.3
VIN=3V VIN=3.2V
IOUT =20mA, VIN=2.7V VIN=3.0V, IOUT =100mA Vin=3.3V to 5.0V Vin=3.3V to 5.0V Shutdown Temperature Recovery Temperature IOUT =0mA VIN =2.7-5.0V, Enable=0V 3 -0.2
88 50 VIN 0.4 ~160 ~140 ~30 ~0.0 1
V V
A A
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YB1300
Regulated Charge Pump 5V 100mA
Typical Characteristics
At TA=25
5 4.9 4.8 Output Voltage (V) 4.7 4.6 4.5 4.4 4.3 4.2 0 20 40 60 80 Output Current (m A) 100 120
TA=25 CPUMP=0.22F COUT=2.2F VIN=3.0V VIN=2.7V VIN=3.6V VIN=4.2V VIN=3.4V
, VIN=3.2V, IOUT=10mA, CIN=COUT=2.2F, CPUMP=0.22F, VENABLE=VIN, unless otherwise noted.
220 Short-Circuit Current (mA) 200 180 160 140 120 100 2.5 3 3.5 4 4.5 Supply Voltage (V) 5 5.5
Fig3. Load Regulation
100 90 80 Efficiency (%)
VIN=3.4V VIN=2.7V VIN=3.0V
Fig6. Short-Circuit Current vs. Supply Voltage
70 60 50 40 30 1 10 Output Current (m A) 100
VIN=3.6V VIN=4.2V
VOUT CN
TA=25 CPUMP=0.22F COUT=2.2F
Fig4. Efficiency
100 80 Output Ripple (mV) 60 40
VIN=3.6V VIN=3.0V VIN=2.7V TA=25 CPUMP=0.22F COUT=2.2F VIN=3.4V
Fig7. Output Ripple VIN=3.6V, IOUT=60mA, COUT=2.2F, CPUMP=0.22F
VIN=4.2V
20 0 0 20 40 60 80 Load Current (m A)
100
120
Fig5. Output Current vs. Output Ripple
YB1300 MRev.1.2
Fig8. Start-Up Time and In-Rush Current VIN=3.0V, IOUT=0mA, COUT=2.2F
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YB1300
Regulated Charge Pump 5V 100mA
Functional Block
Cpump
CN VIN
5 Short-Circuit Protection
4
6
CP
Soft-Start Circuit 1 BOOST DRIVER
VOUT COUT
CIN
Current Bias Generator
Boost Feedback & Timing Control Block
EN
3
Chip Enable
1MHz Oscillator
Thermal Protection
VREF
2
GND
Figure 9. Block Diagram
Functional Description
The YB1300 regulated charge pump provides a regulated 5V output voltage for input voltages between 2.7V and 5V. This is accomplished by a step-up or boost mode of operation. A conversion clock of 50% duty cycle is generated. During the first half cycle, the pumping capacitor CPUMP charges to VIN. During the second half cycle, the voltage on CPUMP is added to VIN, then deliver to VOUT. The output voltage is regulated by skipping clock cycles as necessary. Soft-Start and Short-Circuit Protection Circuitry The YB1300 includes soft-start circuitry to
YB1300 MRev.1.2
limit inrush current at turn-on. When starting up, the output capacitor is charged through the charge-pump capacitor with a limited current source. When the output voltage approached to its design value, the soft-start is terminated and normal operation begins. If an overload condition occurs, for example, the output is shorted to ground, the output current is limited by the YB1300 switching technique. Thermal Protection The regulator has thermal shutdown circuitry that protects it from damage caused by high temperature conditions. The thermal protection circuitry shut down
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YB1300
Regulated Charge Pump 5V 100mA
the device when the junction temperature reached approximately 160 , allowing the device to cool. When the junction temperature cools to approximately 140 , the device is automatically reenabled. Continuously running the regulator into thermal shutdown can degrade reliability. Shutdown Mode A control pin on the regulator can be used to place the device into an energy-saving shutdown mode. In this mode, the output is disconnected from the input. ensure proper regulation under all conditions. Figure 10 and Figure 11 show the recommended layout configuration.
Figure 10. Top layer
Layout Consideration
Due to large transient currents and high switching frequency produced by the YB1300, careful consideration of PCB layout is necessary. In order to minimize both input and output ripple, keep the capacitors as close as possible to the regulator using short, direct circuit traces. A ground plane and short connections to all capacitors will improve performance and
Figure 11. Bottom layer
YB1300 MRev.1.2
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YB1300
Regulated Charge Pump 5V 100mA
Application Information
Vout
Gnd
Gnd EN Vcc
Vcc
Gnd
YB1300 MRev.1.2
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YB1300
Regulated Charge Pump 5V 100mA
Package Information
Notes: 1. 2. 3. Dimension D1 & E1 does not include mold protrusion. Coplanarity of all lead shall be (Before test) 0.1 MAX. from the seating plane. Unless otherwise specified. general physical outline spec is refer to TMC's final visual inspection spec unless otherwise specified.
YB1300 MRev.1.2
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