STOD13A STMicroelectronics, STOD13A Datasheet
STOD13A
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STOD13A Summary of contents
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... DC-DC converter for powering AMOLED displays from WIRE Description The STOD13A is a dual DC-DC converter for AMOLED display panels. It integrates a step-up and an inverting DC-DC converter making it particularly suitable for battery operated products, in which the major concern is overall system efficiency. It works in pulse skipping mode during low load conditions and PWM-MODE at 1 ...
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... Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/24 S features and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 WIRE S protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 WIRE S basic operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 WIRE Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Multiple operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Soft-start and inrush current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Undervoltage lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Fast discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Doc ID 022599 Rev 1 STOD13A ...
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... STOD13A 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Doc ID 022599 Rev 1 Contents 3/24 ...
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... At -6 250 mA load can be provided with inductor saturation current as a minimum of 1.5 A. See Note: All the above components refer to the typical application performance characteristics. Operation of the device is not limited to the choice of these external components. Inductor values ranging from 3.3 µH to 6.8 µH can be used together with the STOD13A. 4/24 VBAT L1 ...
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... STOD13A Figure 2. Block schematic Doc ID 022599 Rev 1 Schematic 5/24 ...
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... Inverting converter output voltage. 10 Inverting converter switching node. 11 Analogic input supply voltage. 12 Power input supply voltage. Internally connected to AGND. Exposed pad must be connected to ground layers in the PCB layout in order to guarantee proper operation Pad of the device. Doc ID 022599 Rev 1 STOD13A Description ...
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... STOD13A 3 Maximum ratings Table 4. Absolute maximum ratings Symbol supply voltage INA INP EN, S Logic input pins WIRE FD Logic input pin ILx Inverting converter switching current 2 Lx Inverting converter switching node voltage 2 V Inverting converter output voltage O2 V Step-up converter output voltage ...
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... INA =10µ Doc ID 022599 Rev µ µF, IN MID 4 -4.9 V unless EN MID O2 Min. Typ. 2.5 3.7 2.22 1.9 2.18 1.7 1.2 1.2 1.35 1 =4.6V, MID 85 82 1.208 1.220 100 4.6 -0.8 no load O2 =100mA; MID -10 STOD13A Max. Unit 4 µA V 0.4 1 µA V 0.4 1.65 MHz % % % 1.232 V µ ...
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... STOD13A Table 6. Electrical characteristics (continued) Symbol Parameter Δ V Load transient response MID T Undershoot/overshoot TDMA Noise Static variation between low and high V level IN I Maximum output current MID MAX I-L Step-up inductor peak current V 1MAX P-channel static drain-source R P1 DSON ON resistance N-channel static drain-source ...
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... DIS T Discharge time DIS 4.2 to 3.7 V, 3.7 to 3.2 V, 3 200 Hz; t INA,P 10/24 Test conditions No load, EN=SW=FD=Low No load, EN=SW=FD=Low MID V at 10% of nominal value O2 = 3.65 ms 1.25 ms OFF Doc ID 022599 Rev 1 STOD13A Min. Typ. Max. Unit Ω 400 µs, pulse signal ...
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... STOD13A 5 Typical performance characteristics 3 INA INP the tests below. Figure 4. Maximum power output vs. input voltage ( INA Figure 6. Efficiency vs. inductor 250 mA MID,O2 Figure 8. Fast discharge No load Low = - 4 25°C; see O2 J Figure 5. = 2.9 to 4.2 V) INP INA INP Figure 7 ...
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... Typical performance characteristics Figure 10. Step-up CCM operation I = 100 mA MID 12/24 Figure 11. Inverting CCM operation I = 100 mA O2 Doc ID 022599 Rev 1 STOD13A ...
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... V for logic “one”) with operation specified over a supply voltage range of 2 4.5 V ● Both master (MCU) and slave (STOD13A) are configured to permit bit sequential data to flow only in one direction at a time; master initiates and controls the device ● ...
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... S WIRE Low High Low High function. WIRE Fast discharge active after IC shutdown No fast discharge function Doc ID 022599 Rev 1 STOD13A V Pulse O2 -4.4 31 -4.3 32 -4.2 33 -4.1 34 -4.0 35 -3.9 36 -3.8 37 -3.7 38 -3 Action Device off Negative output set by S Default negative output voltage ...
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... STOD13A 7 Application information 7.1 External passive components 7.1.1 Inductor selection Magnetic shielded low ESR power inductors must be chosen as the key passive components for switching converters. For the step-up converter an inductance between 4.7 µH and 6.8 µH is recommended. For the inverting stage the suggested inductance ranges from 3.3 µH to 4.7 µH. ...
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... Application information 7.2 Recommended PCB layout The STOD13A is high frequency power switching device and therefore requires a proper PCB layout in order to obtain the necessary stability and optimize line/load regulation and output voltage ripple. Analog input (V INA at the C pad only. The input capacitor must be as close as possible to the IC. ...
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... STOD13A Figure 13. Bottom layer (top view, not to scale) Doc ID 022599 Rev 1 Application information 17/24 ...
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... Pulse skipping operation: The STOD13A works in pulse skipping mode when the load current is below a few mA. The load current level at which this way of operation occurs depends on input voltage only for the step-up converter and on input voltage and negative output voltage (VO2) for the inverting converter ...
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... EN pin is asserted high. 8.1.4 Undervoltage lockout The undervoltage lockout function avoids improper operation of the STOD13A when the input voltage is not high enough. When the input voltage is below the UVLO threshold the device is in shutdown mode. The hysteresis avoids unstable operation when the input voltage is close to the UVLO threshold ...
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... Package mechanical data 9 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions, and product status are available at: ECOPACK registered trademark. 20/24 Doc ID 022599 Rev 1 STOD13A www.st.com . ...
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... STOD13A Dim. Min 0.18 D 2.85 D2 1.87 E 2. 0.30 DFN12L ( 0.6 mm) mechanical data mm. Typ. Max. 0.55 0.60 0.02 0.05 0.20 0.25 0.30 3 3.15 2.02 2.12 3 3.15 1.21 1.31 0.45 0.40 0.50 Doc ID 022599 Rev 1 Package mechanical data inch. Min. Typ. 0.020 0.022 0 0.001 0.008 0.007 0.010 0.112 0.118 0.074 0.080 0.112 0.118 0.042 0.048 0.018 0.012 ...
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... Package mechanical data Figure 14. DFN12L ( mm) footprint recommended data 22/24 Doc ID 022599 Rev 1 STOD13A ...
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... STOD13A 10 Revision history Table 10. Document revision history Date Revision 14-Dec-2011 1 Initial release. Doc ID 022599 Rev 1 Revision history Changes 23/24 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 24/24 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 022599 Rev 1 STOD13A ...