ST755C Datasheet, PDF (1/16 Pages) STMicroelectronics – Adjustable inverting negative output current mode PWM regulators

ST755C
Adjustable inverting negative output
current mode PWM regulators
Features
■ 2.7V to 11V input to adjustable negative output
conversion
■ 1W guaranteed output power
(V_I > 4.5V, T_A ≤70°C)
■ 68% typ. efficiency at 6V
■ Very low quiescent current: 1.2mA in on mode,
10µA in shut down mode
■ Soft start
■ Very low noise output
■ 160KHz fixed frequency oscillator
■ Mixed bipolar-CMOS technology
Description
The ST755 is an adjustable inverting switch-mode
DC-DC regulator with internal Power MOSFET
that generators an adjustable negative output
from a voltage input of 2.7V to 11V, output current
guaranteed at 200mA (for V_I > 4.5V, V_O = -5V
SO-8
and T_A = 0°C to 70°C) and 275mA (typical value
at T_A = 25°C, V_O = -5V).
A logic controlled shut down pin that interfaces
directly with microprocessor reduces supply
current to only 10mA. Input to Output differential
voltage is limited to V_I+|V_O|<12.7V. No load
supply current is 1.2mA
Table 1.
Device summary
Part number
ST755C
July 2007
Package
ST755CD-TR
Rev. 5
Packaging
SO-8 (tape & reel)
1/16
www.st.com
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