T6319A Taiwan Memory Technology, T6319A Datasheet

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T6319A

Manufacturer Part Number
T6319A
Description
High Efficiency 2X charge Pump
Manufacturer
Taiwan Memory Technology
Datasheet
www.DataSheet4U.com
tm
FEATURES
• Wide Input Range: 2.5V to 5.5V
• Available Output Voltages:
• Automatic Step-Up/Step-Down Operation
• Low Input Current Ripple
• Low Output Voltage Ripple
• Minimum Number of External
• Shutdown Mode
• Thermal Protection
• High Output Current :
• Available Package : SOT23-6/
APPLICATIONS
• Smart Card Readers
• Cellular Phones
• White LED Camera Flash
• White LED Backlighting
• Battery Backup Supplies
TM Technology Inc. reserves the right
to change products or specifications without notice.
V
Max. 250mA for pulsed loads
2.5V/2.7V/3.0V/3.3V/4.0V/4.5V /5.0V/5.5V
Components-No Inductors
IN
>3.0V Output Current 100mA
CH
TE
lead-free
High Efficiency 2X charge Pump
P. 1
GENERAL DESCRIPTION
The The T6319A is a switched capacitor
voltage converter, that produces a regulated,
low ripple output voltage from an unregulated
input voltage. A wide-input supply voltage of
2.5V to 5.5V makes the T6319A ideal for a
variety of battery sources, such as single cell
Li-Ion, or two and three cell nickel or alkaline-
based chemistries.
The input voltage may vary above and below
the output voltage and the output will remain
in regulation. It works equally well for step-up
or step-down applications without the need for
an inductor, providing low EMI DC/DC
conversion. The high switching frequency
allows the use of small surface-mount
capacitors, saving board space and reducing
cost. The T6319A is thermally protected.
PART NUMBER EXAMPLES
T6319A-25AXG
T6319A-30AXG
T6319A-50AXG
T6319A-55AXG
Part no.
Voltage
Publication Date: MAY. 2007
Output
2.5V
3.0V
5.0V
5.5V
Package type
SOT23-6
SOT23-6
SOT23-6
SOT23-6
lead-free
lead-free
lead-free
lead-free
T6319A
Revision: A

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T6319A Summary of contents

Page 1

... The The T6319A is a switched capacitor voltage converter, that produces a regulated, low ripple output voltage from an unregulated input voltage. A wide-input supply voltage of 2.5V to 5.5V makes the T6319A ideal for a variety of battery sources, such as single cell Li-Ion, or two and three cell nickel or alkaline- based chemistries. ...

Page 2

... TM Technology Inc. reserves the right to change products or specifications without notice Voltage output 2 Ground pin 3 Enable signal, high active Flying capacitor “-“ terminal 4 5 Input supply pin. Flying capacitor “+” terminal T6319A DESCRIPTION Publication Date: MAY. 2007 Revision: A ...

Page 3

... V <V ,I =100mA 2.5V< IN OUT OUT V <V ,I =100mA 3.0V< IN OUT OUT V <3.0V, I =40mA, 2.7V< IN OUT V < =80mA, 3.1V< IN OUT OUT V < =40mA 3.0V< IN OUT OUT V 5V, Active, NoLoad Current IN= EN=0 V <5V 3.0V< =3.0V, I =100mA, Output=5.0V IN OUT P. 3 T6319A Min. Typ. Max Unit 2.5 5 2.5V 2.40 2.5 2.60 V 2.7V 2.59 2.7 2.80 V 3.0V 2.88 3.0 3.12 V 3.3V 3.16 3.3 3.43 V 4.0V 3.84 4.0 4.16 V 4.5V 4.32 4.5 4.68 V 5.0V 4.80 5.0 5.20 V 5.5V 5.28 5.5 5. 1.0 uA 100 ...

Page 4

... In this mode, the output is disconnected from the input as long as V minimum Charge Pump Efficiency The core of the T6319A is a regulated output voltage doubling charge pump. The efficiency (η deal voltage doubling charge pump an typically be expressed as the output power divided by the input power: η ...

Page 5

... The output capacitor should be placed close to the output terminals to obtain better smoothing effect on the output ripple. TM Technology Inc. reserves the right to change products or specifications without notice Publication Date: MAY. 2007 T6319A Revision: A ...

Page 6

... LED Selection: In applications where the T6319A is utilized as a white LED backlight driver, LEDs with forward voltages up to 5.5V may be used. The T6319A is available in 8 regulated output voltage versions: 2.5V ~ 5.5V. The output voltage option selected will determine the maximum LED forward voltage that can be driven. The trade-off for the lower 4.5V output voltage version is the device’s ability to www.DataSheet4U.com supply greater output current. Refer to the “ ...

Page 7

... CH Flash LED Driver The T6319A can source 250mA for pulsed loads up to 500ms from an input supply as low as 3.3V. This makes the device well suited for low-cost flash LED driver applications in portable poducts. Typically the 4.5V output version of the T6319A should be selected for photo-flash LED applications can maintain better voltage regulation at higher pulsed load current levels (refer to figure “ ...

Page 8

... White LED Backlighting Application P. 8 T6319A ...

Page 9

... Typ. Max. 0.110 0.118 0.062 0.063 0.112 0.118 0.075(BSC) 0.037(BSC) 0.047 0.057 0.043 0.051 0.003 0.06 0.015 0.018 0.023 0.006 0.009 0~8° 5~15° Publication Date: MAY. 2007 T6319A Revision: A ...

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