TPS65138_16 Datasheet, PDF (1/22 Pages) Texas Instruments – Dual output AMOLED Display Power Supply

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TPS65138
TPS65138A
SLVSAV3C – APRIL 2011 – REVISED MAY 2012
Dual output AMOLED Display Power Supply
Check for Samples: TPS65138, TPS65138A
FEATURES
1
• 2.9V to 4.5V Input Voltage Range
• 0.8% Output Voltage Accuracy V_POS
• Excellent Line Transient Regulation
• 300mA Output Current
• Fixed 4.62V Positive Output Voltage
• Digitally Programmable V_NEG
– TPS65138: -2.2V to -6.2V
– TPS65138A: -2.2V to -5.2V
• -4.9V Default Value for V_NEG
• Short Circuit Protection
• Thermal Hhutdown
• 3-mm × 3-mm QFN Package
APPLICATIONS
• Active Matrix OLED
DESCRIPTION
The TPS65138 is designed to drive AMOLED displays (Active Matrix Organic Light Emitting Diode) requiring
positive and negative supply rails. The device integrates boost converter and inverting buck boost converter
designed suitable for battery operated products. The digital control pin (CTRL) allows programming the negative
output voltage in digital steps. The TPS65138 uses a novel technology enabling excellent line and load
regulation. This is required to avoid disturbance of the AMOLED display by the input voltage disturbances
occurring during transmit periods in mobile phones.
TYPICAL APPLICATION SCHEMATIC
V_IN
2.9V to 4.5V
C1
10PFx2
Enable and
Program V_NEG
C4
100nF
L1
4.7PH
PVIN ^TPS65138 SWP
PGND
CTRL
OUTP
OUTN
CT
GND
SWN
VL
C5
100nF
L2
4.7PH
V_POS
4.62V/300mA
C2
10PF
V_NEG
-4.9V/300mA
C3
10PF x 2
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated