sip12203 Vishay, sip12203 Datasheet - Page 4

• Manufacturer Part Number: sip12203
• Description: Triple Step Down Controller Ic For 2 Synchronous And 1 Linear Power Rails
• Manufacturer: Vishay

SiP12203
Vishay Siliconix
Notes:
a. Oscillator frequency here means the switching frequency.
b. Oscillator ramp offset is the minimum voltage, at which the COMP pin needs to be charged up before the switching pulses can occur at DL
FUNCTIONAL BLOCK DIAGRAM
www.vishay.com
4
ISENSE2
COMP 2
SPECIFICATIONS
Parameter
Protection
Under Voltage Lockout for V
Under Voltage Lockout
Hysteresis
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Over Voltage Trip Threshold
Over Voltage Hysteresis
Hiccup Period
Over Current Limit (Channel 1 and Channel 2)
Current Limit Source Current
Overcurrent Limit Voltage
and DH pins.
PGND
BST2
DH2
LX2
CL2
DL2
FB2
27
28
1
2
7
26
20
8
6
20 µA
V
L
L
Shut Down
EN2 EN1
5
V ref
19
UVLO
V ref = 0.6 V
Symbol
V
V
V
T
T
OVHYS
V
Over Voltage
UVLO
OVTH
I
HYS
JSD
CL
CL
Sense
HYS
Overcurrent
Soft Start
Regulator
Sense
10
V
IN
V
UVLO differential voltage between rising
O
rising with respect to set output voltage
Typical 7 cycles of soft start period
V
+
Unless Otherwise Specified
IN
V
4
L
-
= 12 V, T
Oscillator
500 kHz
UVLO
Test Conditions
Gate Control Logic
and falling of V
Figure 2.
Over Temp.
R
V
V
Sense
CL
A
O
L
= - 40 °C to 85 °C
falling
rising
= 5 kΩ
8 MHz Frequency
Generator
12
FB3
V ref
1/16
L
phase shift
180°
-
Overcurrent
13
+
D3
Sense
Over Voltage
Sense
V
FB1
FB2
FB3
L
Soft Start
Min.
105
PGOOD
a
UV
V ref
Limits
Typ.
0.180
165
110
100
3.6
20
45
20
8
S-82337-Rev. B, 22-Sep-08
b
Document Number: 69986
Max.
120
3.9
20 µA
a
3
24
23
22
21
16
25
20
15
18
11
9
14
17
Unit
mV
PG
BST1
DH1
LX1
ISEN SE1
CL1
DL1
PGND
FB1
COMP 1
SYNC
AGND
AGND
AGND
ms
µA
°C
%