Small Surface-Mount Low-Dropout (LDO) Regulators

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Part Naming Conventions for Previous Small Surface-Mount CMOS LDO Regulators

1. Toshiba CMOS Small Surface-Mount LDO regulator
2. Pin count
3.  
   • S: Single output
   • H: Dual output
4. Distingishes differences in pin assignments among 5-pin single-output LDO regulators with a blank or the letter B or C.
   (The TCR6DAxxxx in an SM6 package and the TCR6DAxxxxU in a UF6 package, which are both dual-output LDO regulators, have different pin assignments.)
5. Output voltage
   • Single-output LDO regulators: 18 = 1.8-V output, 285 = 2.85-V output
   • Dual-output LDO regulators: 1525 = 1.5- and2.5-V outputs
6.  
   • D: Auto-discharge and internally pull-down at the CONTROL pin
   • Blank: No auto-discharge and no pull-down at the CONTROL pin
7. Package
   • WBG: WCSP4
   • FE: ESV
   • U: UFV,UF6
   • No mark/A: SMV,SM6

Part Naming Conventions for New Small Surface-Mount CMOS LDO Regulators

1. Toshiba CMOS Small Surface-Mount LDO regulator
2. Max output current
   • 2: 200 mA
   • 3: 300 mA
3. Features
   Indicate function and performance by the combination of output current.

   Symbol	Overcurrent Protection	Thermal Shutdown	Output Discharge	Fast transient response	Inrush current protection
   2B	X		X
   2E	X		X	X
   2D	X	X		X
   3D	X	X	X	X	X

4. Package
   • E: ESV
   • F: SMV
   • N: SDFN4
   • M: DFN4
   • G: WCSP4
5. Output voltage
   • Single-output LDO regulators: 33 = 3.3-V output, 285 = 2.85-V output

Example of Small Surface-Mount Bipolar LDO Regulators

1. Toshiba small surface-mount bipolar LDO regulator
2. Pin count
3. Circuit configuration
   This section shows the circuit configuration of a product.
   • S: single output
   • H: dual output with synchronous control
   • D: dual output with independent control
4. The type of pin assignment
   When there is "S" to section 4, it shows pin assignment as follows.

   
   When there is "H" or "D" to section 4, the symbol here is no mark.

5. When there is "S" to section 4 , the number here shows 10 times the value of its output voltage.
   When there is "H" or "D" to section 4, the number here is a serial number.
6. Package
   • No mark: SMV
   • K: US8
   • U: UFV