LM3475_14 Datasheet, PDF (4/21 Pages) Texas Instruments – Hysteretic PFET Buck Controller

LM3475
SNVS239A – OCTOBER 2004 – REVISED JANUARY 2005
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Electrical Characteristics (continued)
Specifications in Standard type face are for T_J = 25°C, and in bold type face apply over the full Operating Temperature
Range (T_J = −40°C to +125°C). Unless otherwise specified, V_IN = EN = 5.0V. Datasheet min/max specification limits are
guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
I_PGATE
T_SS
Driver Output Current
Soft-Start Time
Source
V_PGATE = 3.5V
C_PGATE = 1nF
Sink
V_PGATE = 3.5V
C_PGATE = 1nF
2.7V < V_IN < 10V (EN
Rising)
0.475
A
1.0
4
ms
T_ONMIN
Minimum On-Time
PGATE Open
180
ns
V_UVD
Under Voltage Detection
Measured at the FB Pin
0.487
0.56
0.613
V
4
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