ST755 Datasheet | STMicroelectronics

DESCRIPTION The ST755 is an adjustable inverting switch-mode DC-DC rergulator with internal Power MOSFET that generaters an adjustable negative output from a voltage input of 2.7V to 11V, output current guaranteed at 200m A (for BLOCK DIAGRAM Vin>4.5V, Vout = -5V and 0o C ≤ Ta ≤ 70o C) and 275m A (typical value at Ta = 25 o C, Vout = -5V). A logic controlled shut down pin that interfaces directly with microprocessor reduces supply current to only 10µA. Input to Output differential voltage is limited to Vin+|Vout|<12.7V. No load supply current is 1.2m A. September 1998 1/9 ABSOLUTE MAXIMUM RATINGS Symbol Vc c SHDN I LX Pt ot To p T stg DC Input Voltage to GND Shutdown Voltage Other Input Voltage Peak Switch Current Power Dissipation (at 70 C) (for DIP-8) (for SO-8) Operating Ambient Temperature Range Storage Temperature Range o Parameter Value -0.3 to 12 -0.3 to VCC +0.3 -0.3 to VCC +0.3 2 725 470 -40 to 85 -55 to 150 Unit V V V A m W o o Absolute Maximum Rating are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. CONNECTION DIAGRAM AND (top view) PIN CONNECTIONS Pin No 1 2 3 4 5 6 7 8 Symbol SHDN V ref SS CC V out G ND LX V CC Name and Function SHUT-DOWN Control (VCC = On, GND=Shutdown) Reference Output Voltage (1.25V) Soft Start pensation Input Negative Output Voltage Ground Switch Output Positive Supply-Voltage Input ORDERING NUMBERS Type ST755 ST755CN DIP-8 SO-8 (Tube) ST755CD SO-8 (T&R) ST755CD-TR 2/9 ELECTRICAL CHARACTERISTICS (Refer to the test circuits, VCC = 5V, Vout = -5.25 to -4.75V, Iload = 0m A, Ta = Tmin to Tmax unless otherwise specified. Typical Value are referred at Ta = 25 o C) Symbol VI N Vo Io Parameter Input Voltage Output Voltage Output Current Io = 0 m A to 200 m A VCC = 4.5 to 6.2 V VCC = 4.5 to 6.2 V Ta = 0 C to 70 C o o VCC = 4.5 to 6.2 V Ta = -40 C to 85 C VCC = 4 V Vout = -5 V VCC = 2.7 V Vout = -5 V No Load, VSHDN = VCC No Load, VSHDN = 0V o o Test...