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Details, datasheet, quote on part number:ISL6522IRZ-T
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Datasheet text preview:
®
ISL652 2
Da ta Sheet N ov e m be r 2002 FN 9 0 30 . 3
Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) Controller
The ISL6522 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The output voltage of the converter can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1% over temperature and line voltage variations. The ISL6522 provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0100%. The ISL6522 protects against overcurrent conditions by inhibiting PWM operation. The ISL6522 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.
Features
· Drives two N-Channel MOSFETs · Operates from +5V or +12V input · Simple single-loop control design - Voltage-mode PWM control · Fast transient response - High-bandwidth error amplifier - Full 0100% duty ratio · Excellent output voltage regulation - 0.8V internal reference - ±1% over line voltage and temperature · Overcurrent fault monitor - Does not require extra current sensing element - Uses MOSFETs rDS(ON) · Converter can source and sink current · Small converter size - Constant frequency operation - 200kHz free-running oscillator programmable from 50kHz to over 1MHz · 14-lead SOIC and TSSOP package and 16-lead 5x5mm MLFP Package · MLFP Package - Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline. - Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
Pinout
TOP VIEW
SOIC and TSSOP
RT OCSET SS COMP FB EN GND
1 2 3 4 5 6 7
14 VCC 13 PVCC 12 LGATE 11 PGND 10 BOOT 9 8 UGATE PHASE
Applications
· Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPCTM microprocessors · High-power 5V to 3.xV DC-DC regulators · Low-voltage distributed power supplies
TOP VIEW
OCSET
Ordering Information
VCC
MLFP
PART NUMBER
12 11 PVCC LGATE PGND BOOT
TEMP. RANGE (oC) 0 to 70 -40 to 85 0 to 70 -40 to 85 0 to 70 -40 to 85
P ACKAGE 14 Ld SOIC 14 Ld SOIC 14 Ld TSSOP 14 Ld TSSOP 16 Ld 5x5 MLFP 16 Ld 5x5 MLFP
PKG. NO. M14. 15 M14. 15 M1 4 . 1 7 3 M1 4 . 1 7 3 L16.5x5B L16.5x5B
NC
16
15
RT 14
13
MLFP
SS COMP FB EN
1 2 3 4 5 NC 6 GND 7 PHASE 8 UGATE
GND
ISL6522CB ISL6522IB ISL6522CV ISL6522IV ISL6522CR ISL6522IR
10 9
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002, All Rights Reserved PowerPC® is a trademark of IBM. AlphaPCTM is a trademark of Digital Equipment Corporation. Pentium® is a registered trademark of Intel Corporation.
1
ISL6522 Typical Application
12V VC C SS MONITOR AND PROTECTION OCSET EN BOOT RT OSC UGAT E PHASE PVCC + + +12V +V O +5V OR +12V
ISL6522
REF
-
LGATE PGND G ND
FB
-
COMP
Block Diagram
VCC
POWER-ON RESET (POR) 10µA OCSET +
EN
-
OVER CURRENT 4V
SOFTST ART
SS BOOT UGAT E PHASE
200µA
REFERENCE
0.8VREF
PWM COM P ARAT OR +
-
+
INHIBIT PWM
FB COMP RT
ERROR AM P
-
GATE CONT ROL LOGIC
PVCC LGATE PGND GND
OSCILLATOR
2
ISL6522
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15.0V Boot Voltage, VBOOT - VPHASE . . . . . . . . . . . . . . . . . . . . . . +15.0V Input, Output or I/O Voltage . . . . . . . . . . . . GND -0.3V to VCC +0.3V ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2
Thermal Information
Thermal Resistance (Typical, Note 1) JA(oC/W) JC(oC/W) SOIC Package (Note 1) . . . . . . . . . . . . . . . . . . . 67 n/a TSSOP Package (Note 1) . . . . . . . . . . . . . . . . . 95 n/a MLFP Package (Note 2 and Note 3) . . . . . . . . . 36 5 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only)
Recommended Operating Conditions
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . +12V ±10% Ambient Temperature Range, ISL6522C. . . . . . . . . . . . 0oC to 70oC Ambient Temperature Range, ISL6522I . . . . . . . . . . -40oC to 85oC Junction Temperature Range, ISL6522C . . . . . . . . . . 0oC to 125oC Junction Temperature Range, ISL6522I . . . . . . . . . -40oC to 125oC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on a highs effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 2. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. SeeTech Brief TB379. 3. For JC, the "case temp" location is the center of the exposed metal pad on the package underside.
Electrical Specifications
PARAMETER VCC SUPPLY CURRENT Nominal Supply Shutdown Supply POWER-ON RESET Rising VCC Threshold Falling VCC Threshold Enable-Input Threshold Voltage
Recommended Operating Conditions, Unless Otherwise Noted SYMBOL TEST CONDITIONS MIN TYP M AX UNITS
ICC
EN = VCC; UGATE and LGATE Open EN = 0V
-
5 50
100
mA µA
VOCSET = 4.5VDC VOCSET = 4.5VDC ISL6522C, VOCSET = 4.5VDC ISL6522I, VOCSET = 4.5VDC
8.8 0.8 0.8 -
1. 27
10.4 2. 0 2. 1 -
V V V V V
Rising VOCSET Threshold OSCILLATOR Free Running Frequency ISL6522C, RT = OPEN, VCC = 12 ISL6522I, RT = OPEN, VCC = 12 Total Variation Ramp Amplitude REFERENCE Reference Voltage Tolerance Reference Voltage ERROR AMPLIFIER DC Gain Gain-Bandwidth Product Slew Rate GATE DRIVERS Upper Gate Source IUGATE VBOOT - VPHASE = 12V, VUGATE = 6V G BW SR COMP = 10pF VREF VOSC 6k < RT to GND < 200k RT = OPEN
175 160 -20 -
200 200 1.9
230 230 + 20 -
kHz
% VP-P
-1 -
0.800
1 -
% V
-
88 15 6
-
dB MH z V/µs
350
500
-
mA
3
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