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PDF CS5150H Data sheet ( Hoja de datos )
| Número de pieza | CS5150H | |
| Descripción | CPU 4-Bit Synchronous Buck Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CS5150H (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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CS5150H
CPU 4−Bit Synchronous
Buck Controller
The CS5150H is a 4−bit synchronous dual N−Channel buck
controller. It is designed to provide unprecedented transient response
for today’s demanding high−density, high−speed logic. The regulator
operates using a proprietary control method, which allows a 100 ns
response time to load transients. The CS5150H is designed to operate
over a 4.25−20 V range (VCC) using 12 V to power the IC and 5.0 V or
12 V as the main supply for conversion.
The CS5150H is specifically designed to power Pentium® Pro
processors and other high performance core logic. It includes the
following features: on board, 4−bit DAC, short circuit protection,
1.0% output tolerance, VCC monitor, and programmable Soft Start
capability. The CS5150H is upward compatible with the 5−bit
CS5155H, allowing the mother board designer the capability of using
either the CS5150H or the CS5155H with no change in layout. The
CS5150H is available in 16 pin surface mount.
Features
• Dual N−Channel Design
• Excess of 1.0 MHz Operation
• 100 ns Transient Response
• 4−Bit DAC
• Upward Compatible with 5−Bit CS5155H/CS5156H
• 30 ns Gate Rise/Fall Times
• 1.0% DAC Accuracy
• 5.0 V & 12 V Operation
• Remote Sense
• Programmable Soft Start
• Lossless Short Circuit Protection
• VCC Monitor
• 25 ns FET Nonoverlap Time
• Adaptive Voltage Positioning
• V2™ Control Topology
• Current Sharing
• Overvoltage Protection
http://onsemi.com
16
1
SOIC−16
D SUFFIX
CASE 751B
MARKING
DIAGRAM
16
CS5150H
AWLYWW
1
A
WL, L
YY, Y
WW, W
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN CONNECTIONS
1
VID0
VID1
VID2
VID3
SS
NC
COFF
VFFB
16 VFB
COMP
LGND
VCC1
VGATE(L)
PGND
VGATE(H)
VCC2
ORDERING INFORMATION
Device
CS5150HGD16
CS5150HGDR16
Package
Shipping
SO−16
SO−16
48 Units/Rail
2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
1
Publication Order Number:
CS5150H/D
1 page  
PACKAGE PIN #
16 Lead SO Narrow
1, 2, 3, 4
5
6
7
8
9
10
11
12
13
14
15
16
CS5150H
PACKAGE PIN DESCRIPTION
PIN SYMBOL
VID0−VID3
SS
NC
COFF
VFFB
VCC2
VGATE(H)
PGND
VGATE(L)
VCC1
LGND
COMP
VFB
FUNCTION
Voltage ID DAC input pins. These pins are internally pulled
up to 5.0 V providing logic ones if left open. The DAC range
is 2.14 V to 3.54 V with 100 mV increments. VID0 − VID3
select the desired DAC output voltage. Leaving all 4 DAC
input pins open results in a DAC output voltage of 1.244 V,
allowing for adjustable output voltage, using a traditional
resistor divider.
Soft Start Pin. A capacitor from this pin to LGND in conjunc-
tion with internal 60 μA current source provides Soft Start
function for the controller. This pin disables fault detect func-
tion during Soft Start. When a fault is detected, the Soft Start
capacitor is slowly discharged by internal 2.0 μA current
source setting the time out before trying to restart the IC.
Charge/discharge current ratio of 30 sets the duty cycle for
the IC when the regulator output is shorted.
No Connection.
A capacitor from this pin to ground sets the time duration for
the on board one shot, which is used for the constant off time
architecture.
Fast feedback connection to the PWM comparator. This pin
is connected to the regulator output. The inner feedback loop
terminates on time.
Boosted power for the high side gate driver.
High FET driver pin capable of 1.5 A peak switching current.
Internal circuit prevents VGATE(H) and VGATE(L) from being in
high state simultaneously.
High current ground for the IC. The MOSFET drivers are
referenced to this pin. Input capacitor ground and the source
of lower FET should be tied to this pin.
Low FET driver pin capable of 1.5 A peak switching current.
Input power for the IC and low side gate driver.
Signal ground for the IC. All control circuits are referenced to
this pin.
Error amplifier compensation pin. A capacitor to ground
should be provided externally to compensate the amplifier.
Error amplifier DC feedback input. This is the master voltage
feedback which sets the output voltage. This pin can be con-
nected directly to the output or a remote sense trace.
http://onsemi.com
5
5 Page 
CS5150H
condition ceases or the input voltage is pulled low. The
bottom FET and board trace must be properly designed to
implement the OVP function.
Shutdown
Input
5.0 V
MMUN2111T1 (SOT−23)
IN4148
5 SS
CS5150H
8 VFFB
M 10.0 μs
Trace 4− 5.0 V from PC Power Supply (5.0 V/div.)
Trace 1− Regulator Output Voltage (1.0 V/div.)
Trace 2− Inductor Switching Node 5.0 V/div.)
Figure 14. OVP Response to an Input−to−Output
Short Circuit by Immediately Providing 0% Duty
Cycle, Crow−Barring the Input Voltage to Ground
M 5.00 ms
Trace 4− 5.0 V from PC Power Supply (2.0 V/div.)
Trace 1− Regulator Output Voltage (1.0 V/div.)
Figure 15. OVP Response to an Input−to−Output Short
Circuit by Pulling the Input Voltage to Ground
External Output Enable Circuit
On/off control of the regulator can be implemented
through the addition of two additional discrete components
(see Figure 16). This circuit operates by pulling the Soft
Start pin high, and the VFFB pin low, emulating a short
circuit condition.
Figure 16. Implementing Shutdown with the CS5150H
External Power Good Circuit
An optional Power Good signal can be generated through
the use of four additional external components (see Figure
17). The threshold voltage of the Power Good signal can be
adjusted per the following equation:
VPower
Good
+
(R1
)
R2)
R2
0.65 V
This circuit provides an open collector output that drives
the Power Good output to ground for regulator voltages less
than VPower Good.
5.0 V
VOUT
CS5150H
R1
10 k
R3
10 k
PN3904
R2
6.2 k
Power Good
PN3904
Figure 17. Implementing Power Good with the CS5150H
http://onsemi.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet CS5150H.PDF ] | |
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