SI9138 Datasheet, PDF (3/14 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

New Product
Si9138
Vishay Siliconix
SPECIFICATIONS
Test Conditions
Limits
Parameter
Reference
V_IN = 15 V , I_VL = I_REF = 0 mA
T_A = 0_C to 90_C, All Controllers ON
Min^a
Typ^b
REF Output
REF Load Regulation
No External Load
0 to 1 mA
3.24
3.30
30
Supply Current
Supply Current*Shutdown
Supply Current*Operation
Oscillator
All Converters OFF, No Load
All Controllers ON, No Load, f_OSC = 300 kHz
25
1100
Oscillator Frequency
Maximum Duty Cycle
270
300
92
95
Fault Detection 3.3-V and 5-V Outputs
Overvoltage Trip Threshold
Overvoltage-Fault Propagation Delay
Output Undervoltage Threshold
Output Undervoltage Lockout Time
With Respect To Unloaded Output Voltage
6
10
CS3 or CS5 Driven 2% Above Overvoltage Trip
Threshold
1.5
With Respect to Unloaded Output Voltage
–40
–50
From each SMPS Enabled
16
20
RESET
RESET Start Threshold
RESET Propagation Delay (Falling)
RESET Delay Time (Rising)
With Respect To Unloaded Output Voltage
Rising Edge
–5.5
Falling Edge, FB3 or FB5 Driven 2% Above Overvol-
tage or 2% Below Undervoltage Lockout Thresholds
1.5
With Respect to 2nd SMPS Lockout Time Done
92
107
Inputs and Outputs
Feedback Input Leakage Current
FBFY = 3.3 V
Input Leakage Current
ON3, ON5, V_IN = 0 V or V_L
Gate Driver Sink/Source Current (Buck)
DL3, DH3, DL5, DH5 Forced to 2 V
1
Gate Driver On-Resistance (Buck)
High or Low
2
Gate Driver Sink/Source Current (Buck-Boost)
DHFY, DLFY Forced to 2 V
0.2
Gate Driver On-Resistance (Buck-Boost)
High or Low
RESET Output Low Voltage
RESET Output High Leakage
RESET, I_SINK = 4 mA
RESET = 5 V
ON3, ON5
Logic Low
Logic High
V_IL
V_IH
2.4
Notes
a. The algebraic convention is used whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing, and are measured at T_A = 25_C.
Max^a
3.36
75
60
1800
330
14
–20
24
122
1
"1
7
15
0.4
1
0.8
Unit
V
mV
mA
kHz
%
%
ms
%
ms
%
ms
ms
mA
A
W
A
W
V
mA
V
Document Number: 71446
S-20642—Rev. B, 13-May-02
www.vishay.com
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