Datasheet 7404

ST3M01
TRIPLE VOLTAGE REGULATOR
s s

s

s s s

ONLY TWO CELL NEED AS INPUT THREE REGULATED OUTPUT 1) HIGH EFFICENCY PFM DC/DC CONVERTER 3.3V AT 200mA (87% EFFICENCY) 2) VERY LOW NOISE ANDVERY LOW DROP VREG (3V AT 20mA) 3) VERY LOW NOISE AAND VERY LOW DROP VREG (1.9V AT 20mA) LOGIC CONTROLLED ELECTRONIC SHUTDOWN LOW BATTERY DETECTOR VIRTUAL GND PIN TEMPERATURA RANGE: -40 TO 85°C

SO-14SCHEMATIC DIAGRAM
Vin 150 µF 15 µH IN_SW Lx DC/DC DC/DC OUT DC/DC Linear A OUT LA 1 µF IN_Linear Linear B OUT LB 1 µF Virtual GND 150 µF

On-Mode Off-Mode

SHDN

+
LBO Ref Ref

-

Vref100 nF

1 KΩ

GND_SW

GND_Signal

November 2000

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ST3M01
ABSOLUTE MAXIMUM RATINGS
Symbol VIN VSHDN VLX VLBO ILBO Tstg Top Shutdown Input Voltage Switch Voltage Low Battery OutputVoltage Low Battery Output Maximum Current Storage Temperature Range Operating Junction Temperature Range Parameter DC Input Voltage (Both IN_Linear and IN_SW) Value -0.3 to 7 -0.3 to VIN+0.3 -0.3 to 7-0.3 to 7 -0.3 to 7 30 30 -65 to +150 -40 to +85 Unit V V V V V mA mA °C °C

Vvirtual_GND Virtual GND Output Voltage Ivirtual_GND Virtual GND Output Maximum Current

THERMAL DATA
Symbol Rthj-ambParameter Thermal Resistance Junction-ambient (*) Value 160 Unit °C/W

ORDER CODES
Type ST3M01D ST3M01DTR Package SO-14 SO-14 (Tape & Reel) Comment 50 parts per tube / 20 tube per box 2500 partsper reel

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ST3M01
CONNECTION DIAGRAM (top view)

PIN DESCRIPTION
Pin N° 1 2 3 4 5 6 7 Symbol GND SW GND SW Virtual GND LBO VREF IN Linear OUT LB Name and Function Switching Ground. Mustbe low impedance; solder directly to GND plane Switching Ground. Must be low impedance; solder directly to GND plane Virtual GND. Open Drain N-Cnannel MOSFET: must be high impedance when the LowBattery condition is detected. Low Battery Output. Open Drain N-Cnannel MOSFET: sinks current when the input voltage drops below 2V typically. Reference Voltage Output. Bypass with 0.1 µF to improve the...