STOD03B STMicroelectronics, STOD03B Datasheet
STOD03B
Specifications of STOD03B
Related parts for STOD03B
STOD03B Summary of contents
Page 1
... DC-DC converter with LDO for powering AMOLED displays from WIRE Description The STOD03B 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 the overall system efficiency. It works in pulse skipping mode during low load conditions and PWM-MODE at 1 ...
Page 2
... S WIRE Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Multiple operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Soft-start and inrush current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Undervoltage lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Doc ID 022613 Rev 1 STOD03B ...
Page 3
... GRM219R61A106KE44 C IN TAIYO YUDEN MURATA GRM219R61A106KE44 C O1 TAIYO YUDEN MURATA GRM219R61A106KE44 C O2 TAIYO YUDEN VBAT L1 CIN VINP VINA Swire S-Wire STOD03B EN EN VREF PGND CREF Part number Value LPS4012-472ML LQH3NPN4R7MJ0 CIG22B4R7MNE 4.7µH LPF2810T-4R7M LPF2807T-4R7M LPS4012-472ML LQH3NPN4R7MJ0 4.7µH 4R7N LPF2807T-4R7M 10µF LMK212BJ106KD-T 10µ ...
Page 4
... 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 STOD03B. Figure 2. Block schematic VINP ...
Page 5
... STOD03B 2 Pin configuration Figure 3. Pin configuration (top view) Table 3. Pin description Pin name Pin n° PGND V MID V O1 AGND V REF S WIRE Exposed pad 1. No pull-up/pull-down resistors are needed. 1 Boost converter switching node ...
Page 6
... Table 5. Thermal data Symbol R Thermal resistance junction-ambient thJA R Thermal resistance junction-case (FR-4 PCB) thJC 1. The package is mounted on a 4-layer (2S2P) JEDEC board as per JESD51-7. 6/22 Parameter Parameter (1) Doc ID 022613 Rev 1 STOD03B Value Unit -0 -0.3 to 4.6 V Internally limited A - +0.3 V INP -10 to AGND+0 ...
Page 7
... STOD03B 4 Electrical characteristics ° INA x10 µ -4.9 V unless otherwise specified. O2 Table 6. Electrical characteristics Symbol Parameter General section V V Supply input voltage INA, INP UVLO_H Undervoltage lockout HIGH UVLO_L Undervoltage lockout LOW I_V Input current I I Shutdown current ...
Page 8
... 100mA load =2.9V to 4.8V INA,P V below 10% of nominal O2 value V =V =3.7V; INA INP I =100mA SW- =3.7V; INA INP I =100mA SW-P2 = 3.65 ms 1.25 ms OFF Doc ID 022613 Rev 1 STOD03B Min. Typ. Max Unit ±20 mV 150 mA 4.8 4.9 5.0 V -05 0 1.1 A Ω 1.0 1.6 Ω 0.4 0.7 -5.4 -2.4 V -4.97 -4.9 -4.83 V -0.5 0.5 % +12 mV ± ...
Page 9
... STOD03B 5 Typical performance characteristics °C; See O2 J Figure 4. Max power output vs. V Figure 6. Positive output operation I = 100 mA O1 Figure 8. Soft-start inrush current I = 200 mA 4 Typical performance characteristics Table 1. for external components used in the tests below. Figure 5. Efficiency vs. output current IN Figure 7 ...
Page 10
... V for logic “one”) with operation specified over a supply voltage range of 2 4.8 V ● Both master (MCU) and slave (STOD03B) are configured to permit bit sequential data to flow only in one direction at a time; master initiates and controls the device ● ...
Page 11
... STOD03B 6.2 Negative output voltage levels Table 7. Default output voltage Pulse -5.4 2 -5.3 3 -5.2 4 -5.1 5 -5.0 (1) 6 -4.9 7 -4.8 8 -4.7 9 -4.6 10 -4.5 1. Default value. 6.3 Enable and S Table 8. EN and S operation table WIRE Enable Low Low High High 1. The Enable pin must be set to AGND while using the S ...
Page 12
... The negative output voltage can be set via S current, at the maximum load condition, increases. A proper inductor, with a saturation current as a minimum preferred. STOD03B is capable of supplying a load current from 150 mA to 200 mA. Inductors with a saturation current as a minimum must be selected. 12/22 × ...
Page 13
... V ±10% as CO2 can be used to achieve the needed 6 µF. O1 7.2 Recommended PCB layout The STOD03B is a 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 ...
Page 14
... Application information Figure 11. Bottom layer and silk-screen (top view, not to scale) 14/22 Doc ID 022613 Rev 1 STOD03B ...
Page 15
... Pulse skipping operation: The STOD03B works in pulse skipping mode when the load current is below a few mA. The load current level at which this way of operating occurs depends on input voltage only for the step-up converter and on input voltage and negative output voltage (V inverting converter ...
Page 16
... EN pin is asserted high. 8.1.4 Undervoltage lockout The undervoltage lockout function avoids improper operation of the STOD03B 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 ...
Page 17
... STOD03B 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 trademark. Doc ID 022613 Rev 1 Package mechanical data www.st.com ...
Page 18
... E2 1. 0.30 18/22 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 022613 Rev 1 STOD03B 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 0.016 8085116/A Max. 0.024 0.002 0.012 0.124 0.083 0.124 ...
Page 19
... STOD03B Tape & reel QFNxx/DFNxx (3x3) mechanical data DIM. MIN 12 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 101 3.898 14.4 3.3 3.3 1 Doc ID 022613 Rev 1 Package mechanical data inch TYP. MAX. 12.992 0.519 3.976 0.567 0.130 0.130 0.043 ...
Page 20
... Package mechanical data Figure 12. DFN12L ( mm) footprint recommended data 20/22 Doc ID 022613 Rev 1 STOD03B ...
Page 21
... STOD03B 10 Revision history Table 9. Document revision history Date Revision 19-Dec-2011 1 Initial release. Doc ID 022613 Rev 1 Revision history Changes 21/22 ...
Page 22
... 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 22/22 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 022613 Rev 1 STOD03B ...