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PWM Controller. ISL95833 Datasheet

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PWM Controller. ISL95833 Datasheet






ISL95833 Controller. Datasheet pdf. Equivalent




ISL95833 Controller. Datasheet pdf. Equivalent





Part

ISL95833

Description

Dual 2+1 PWM Controller

Manufacture

Intersil Corporation

Datasheet
Download ISL95833 Datasheet


Intersil Corporation ISL95833

ISL95833; Dual 3+1 PWM Controller with Current Mon itor for IMVP-7/VR12™ CPUs ISL95839 The ISL95839 Pulse Width Modulation (PW M) controller IC provides a complete so lution for IMVP-7/VR12™ compliant mic roprocessor and graphic processor core power supplies. It provides the control and protection for two Voltage Regulat ors (VRs). The first VR, typical for Vc ore, incorporates 2 in.


Intersil Corporation ISL95833

tegrated drivers and can operate in 3-, 2- or 1-phase configurations. The secon d VR, typical for Graphics, incorporate s 1 integrated driver. The two VRs shar e a serial control bus to communicate w ith the CPU and achieve lower cost and smaller board area compared with the tw o-chip approach. Both VRs utilize Inter sil’s Robust Ripple Regulator R3 Tech nology™. The R3 modu.


Intersil Corporation ISL95833

lator has numerous advantages compared t o traditional modulators, including fas ter transient response, variable switch ing frequency during load transients, a nd improved light load efficiency due t o its ability to automatically change s witching frequency. The ISL95839 has se veral other key features. Both outputs support either DCR current sensing with a single NTC ther.



Part

ISL95833

Description

Dual 2+1 PWM Controller

Manufacture

Intersil Corporation

Datasheet
Download ISL95833 Datasheet




 ISL95833
Dual 3+1 PWM Controller with Current Monitor for
IMVP-7/VR12™ CPUs
ISL95839
The ISL95839 Pulse Width Modulation (PWM) controller IC
provides a complete solution for IMVP-7/VR12™ compliant
microprocessor and graphic processor core power supplies. It
provides the control and protection for two Voltage Regulators
(VRs). The first VR, typical for Vcore, incorporates 2 integrated
drivers and can operate in 3-, 2- or 1-phase configurations. The
second VR, typical for Graphics, incorporates 1 integrated
driver. The two VRs share a serial control bus to communicate
with the CPU and achieve lower cost and smaller board area
compared with the two-chip approach.
Both VRs utilize Intersil’s Robust Ripple Regulator R3
Technology™. The R3 modulator has numerous advantages
compared to traditional modulators, including faster transient
response, variable switching frequency during load transients,
and improved light load efficiency due to its ability to
automatically change switching frequency.
The ISL95839 has several other key features. Both outputs
support either DCR current sensing with a single NTC
thermistor for DCR temperature compensation, or more
precise resistor current sensing if desired. Both outputs come
with remote voltage sense, programmable VBOOT voltage,
IMAX, and switching frequency, adjustable overcurrent
protection and separate Power-Good signals.
Features
• Serial data bus
• Dual outputs:
- Configurable 3-, 2- or 1-phase for the 1st output using two
integrated gate drivers
- 2nd output using an integrated gate driver
• R3™ Modulator
- Excellent transient response
- High light load efficiency
• 0.5% system accuracy over-temperature
• Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
• Differential remote voltage sensing
• Programmable VBOOT voltage at start-up
• Resistor programmable IMAX, switching frequency for both
outputs
• Output current monitor (IMON and IMONG)
• Adaptive body diode conduction time reduction
Applications
• IMVP-7/VR12 compliant computers
Vin
VR2
Vin
ISL95839
ISL6208B
DRIVER
Vin
VR1
Vin
0.91
0.90
0.89
0.88
0.87
0.86
0.85
0.84
0.83
0.82
0.81
0.80
0
VIN = 19V
VIN = 12V
VIN = 8V
6 12 18 24 30 36 42 48 54 60 66
IOUT (A)
FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT
FIGURE 2. LOAD LINE REGULATION
May 9, 2013
FN8315.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC 2013. All Rights Reserved
Intersil (and design) and R3 Technology™ are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.





 ISL95833
ISL95839
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Simplified Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gate Driver Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Multiphase R3™ Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Diode Emulation and Period Stretching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Start-up Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Voltage Regulation and Load Line Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Current Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Differential Voltage Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Phase Current Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CCM Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Dynamic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
VR_HOT#/ALERT# Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
FB2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Adaptive Body Diode Conduction Time Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Supported Data and Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Key Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Inductor DCR Current-Sensing Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Resistor Current-Sensing Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Programming Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Current Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Slew Rate Compensation Circuit for VID Transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Typical Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2
FN8315.0
May 9, 2013





 ISL95833
ISL95839
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL95839HRTZ
95839 HRTZ
-10 to +100
40 Ld 5x5 TQFN
L40.5x5
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL95839. For more information on MSL please see techbrief TB363.
Pin Configuration
ISL95839
(40 LD TQFN)
TOP VIEW
40 39 38 37 36 35 34 33 32 31
ISUMPG 1
IMONG 2
IMON 3
NTCG 4
SCLK 5
ALERT# 6
GND PAD
(BOTTOM)
SDA 7
VR_HOT# 8
FB2 9
NTC 10
11 12 13 14 15 16 17 18 19 20
30 BOOT2
29 UGATE2
28 PHASE2
27 LGATE2
26 VCCP
25 VDD
24 PWM3
23 LGATE1
22 PHASE1
21 UGATE1
Pin Descriptions
PIN # SYMBOL
DESCRIPTION
2
IMONG Output current monitor for VR2.
3
IMON
Output current monitor for VR1.
4
NTCG
The second thermistor input to VR_HOT# circuit. Use it to monitor VR2 temperature.
5, 6, 7 SCLK, ALERT#, Communication bus between the CPU and the VRs.
SDA
8
VR_HOT# Open drain thermal overload output indicator. Can be considered part of communication bus with CPU.
9
FB2
There is a switch between the FB2 pin and the FB pin. The switch is on when VR1 is in 3-phase and 2-phase mode and is off
in 1-phase mode. The components connecting to FB2 are used to adjust the compensation in 1-phase mode to achieve
optimum performance for VR1.
10
NTC
One of the thermistor inputs to VR_HOT# circuit. Use it to monitor VR1 temperature.
11
ISEN3
ISEN3 is the individual current sensing for VR1 phase 3.
3
FN8315.0
May 9, 2013



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