http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf





O2Micro International
O2Micro International

OZ826 Datasheet Preview

OZ826 Datasheet

Dual-Phase DC-DC Controller

No Preview Available !

OZ826 pdf
OZ826
Dual-Phase DC-DC Controller for AMD Mobile CPU
FEATURES
Dual-phase DC-DC controller with integrated drivers
6 bit AMD VID codes compatible
1% output voltage accuracy
6V to 24V input supports 2s to 5s battery power
Voltage Feed-Forward Compensation
High efficiency, up to 94%
High light-load efficiency: 80% at 200mA
Non-audio skip mode
Constant Ripple-Current topology facilitates optimum
inductor size
Supports 60A output current
Ultra-fast transient recovery
Adjustable load line support
Slew control at start-up and OTF VID changes
True differential output voltage remote sensing
AMD compliant Power Good signal
VIN & VDDA Undervoltage Lockout Protection
Latched over-voltage protection
Cycle-by-cycle Overcurrent protection with latched
timeout
Small, thin 5x5 QFN32 package
APPLICATIONS
Notebook CPU power supplies
ORDERING INFORMATION
Part Number
OZ826LN
Temp Range
0oC to 85oC
Package
32 QFN 5x5mm
GENERAL DESCRIPTION
OZ826 is a DC/DC controller specifically developed to
support the design of power supplies for AMD mobile
microprocessors supporting the 6 bit VID codes (see Table
1). Its high efficiency under both light and heavy load
conditions, DC accuracy, remote voltage sensing and
excellent transient response make it a good choice for low
voltage CPUs.
The core topology is based on a constant-ripple current
sync-buck controller with integrated drivers. The voltage
feed-forward compensation ensures a high rejection of
input voltage transients.
Overvoltage Protection (OVP) acts when the output voltage
exceeds the 1.8V threshold. This protection condition is
latched and the shutdown occurs. After an OVP event, the
EN pin should be toggled or VDDA cycled to restart the
circuit.
Under Voltage Lockout (UVLO) circuit monitors both VDDA
and VIN. Shut down occurs when VDDA falls below 4.2V
or VIN is less than typically 4.8V.
The output is protected against overload by a cycle-by-
cycle Overcurrent Protection (OCP) circuit. Its limit is user-
adjustable. Maximum OCP timeout is typically 1ms.
The Power Good (PG) signal is open drain unless the
output voltage drops more than 250mV off the set VID.
At start-up the output voltage ramps up in a controlled
manner with an externally adjustable slew rate.
SIMPLIFIED APPLICATION DIAGRAM
PIN DIAGRAM
www.DataSheet4U.com
07/31/08
Copyright © 2005-2008 by O2Micro
Patent #6,844,710
OZ826-SF-v1.0
All Rights Reserved
Page 1



O2Micro International
O2Micro International

OZ826 Datasheet Preview

OZ826 Datasheet

Dual-Phase DC-DC Controller

No Preview Available !

OZ826 pdf
PIN DESCRIPTION
No. Name
1 NC
2 COMPV
3 VREF
4 TSET
5 PSI_L
6 EN
7 PG
8 HDR2
9 LX2
10 BST2
11 LDR2
12 VDDP
13 GNDP
14 LDR1
15 BST1
16 LX1
17 HDR1
18 VIN
19 VID0
20 VID1
21 VID2
22 VID3
23 VID4
24 VID5
25 NC
26 ILIM
27 VDDA
28 SLEW
29 CSP
30 CSN
31 RSP
32 RSN
33 GNDA
OZ826
I/O Type
Description
- - No internal connection
I/O Analog Compensation pin. Requires a capacitor to analog ground
O Analog 1.55V, +/-1% precision reference voltage
I Analog Adjusts the on time interval
I
Digital
Enables skip mode of operation when asserted low, 120kinternal
pull down resistor
I
Digital
Enables the controller operation. When asserted high, initiates the
startup sequence. 120kinternal pull down resistor
O
Digital
Power good open drain output. It only provides an indication that the
output voltage is within VID set voltage -250mV
O Digital Output of the high side driver of phase 2
P Power Inductor switching node for phase 2
P
Power
Positive supply for the high side driver of phase 2. A 0.22µF capacitor
should be placed between BST2 and LX2
O Digital Output of the low side driver of phase 2
P Power Power supply for the low side drivers
P Power Power ground for low side drivers
O Digital Output of the low side driver of phase 1
P
Power
Positive supply for the high side driver of phase 1. A 0.22µF capacitor
should be placed between BST1 and LX1
P Power Inductor switching node for phase 1
O Digital Output of the high side driver of phase 1
I Analog Sensing pin for the input voltage of the power stage
I Digital Voltage Identification pin, bit 0, 120kinternal pull down resistor
I Digital Voltage Identification pin, bit 1, 120kinternal pull down resistor
I Digital Voltage Identification pin, bit 2, 120kinternal pull down resistor
I Digital Voltage Identification pin, bit 3, 120kinternal pull down resistor
I Digital Voltage Identification pin, bit 4, 120kinternal pull down resistor
I Digital Voltage Identification pin, bit 5, 120kinternal pull down resistor
- - No internal connection
I Analog Sets the current limit threshold
P Power +5V supply for the controller analog circuits.
I/O
Analog
Controls the slew rate of the output voltage during start up and OTF
VID code change
I
Analog
Non-inverting current sense pin; also provides voltage feedback
information
I Analog Inverting current sense pin
I Analog Non-inverting voltage remote sense pin
I Analog Inverting voltage remote sense pin
P Power Ground for the controller analog circuits
OZ826-SF-v1.0
Page 2


Part Number OZ826
Description Dual-Phase DC-DC Controller
Maker O2Micro International
Total Page 7 Pages
PDF Download
OZ826 pdf
Download PDF File
[partsNo] view html
View PDF for Mobile






Related Datasheet

1 OZ826 Dual-Phase DC-DC Controller O2Micro International
O2Micro International
OZ826 pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components