zl1505 Intersil Corporation, zl1505 Datasheet

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zl1505

Manufacturer Part Number
zl1505
Description
Synchronous Step-down Mosfet Drivers
Manufacturer
Intersil Corporation
Datasheet

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Part Number
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Price
Part Number:
zl1505ALNNT
Manufacturer:
INTERSIL
Quantity:
20 000
Description
The ZL1505 is an integrated high-speed, high-
current
synchronous
applications. When used with Zilker Labs Digital-
DC™ PWM controllers, the ZL1505 enables
dynamically adaptive dead-time control that
optimizes
conditions. A dual input PWM configuration
enables
minimizing complexity within the driver.
Operating from a 4.5 V to 7.5 V input, the
ZL1505 combines a 5 A, 0.5 Ω low-side driver
and a 3 A, 0.8 Ω high-side driver to support high
step-down
adjustable gate drive current scheme allows the
user to adjust the drive current on both drivers to
optimize performance for a wide rage of
input/output voltages, load currents, power
MOSFETs and switching frequencies up to 1.4
MHz. An integrated 30 V bootstrap Schottky
diode is used to charge the external bootstrap
capacitor. An internal watchdog circuit prevents
excessive shoot-through currents and protects
the external MOSFET switches.
The ZL1505 is specified over a wide -40 °C to
125 °C junction temperature range and is
available in an exposed pad DFN-10 package.
Synchronous Step-Down MOSFET Drivers
N-channel
this
efficiency
buck
step-down
efficiency
1
applications.
PWMH
PWML
VDD
MOSFET
under
DC-DC
optimization
all
driver
A
conversion
Level
Figure 1. ZL1505 Block Diagram
operating
shift
unique
while
Data Sheet
for
ZL1505
Protection
through
Shoot-
1-888-INTERSIL or 1-888-468-3774
GND
VDD
Features
Applications
HSEL
High-speed, high-current drivers for
synchronous N-channel MOSFETs
Adaptive dead-time control optimizes efficiency
when used with Digital-DC controllers
Adjustable gate drive voltage: 4.5 V to 7.5 V
Integrated 30 V bootstrap Schottky diode
Capable of driving ≥ 40 A per phase
Supports switching frequency up to 1.4 MHz
- >4 A source, >5 A sink low-side driver
- >3 A source/sink high-side driver
- <10 ns rise/fall times, low propagation delay
Adjustable gate drive strength optimizes
efficiency for different V
MOSFET combinations
Internal non-overlap watchdog prevents shoot-
through currents
Exposed pad 3 x 3 mm DFN-10 package
RoHS-compliant, Pb-free
High efficiency, high-current DC-DC buck
converters with digital control and PMBus™
Multi-phase digital DC-DC converters with
phase adding/dropping
Power train modules
Synchronous rectification for secondary side
isolated power converters
February 18, 2009
All other trademarks mentioned are the property of their respective owners
|
LSEL
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved
BST
GH
SW
GL
IN
, V
OUT
, I
OUT
ZL1505
, F
SW
FN6845.0
and

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zl1505 Summary of contents

Page 1

... MHz. An integrated 30 V bootstrap Schottky diode is used to charge the external bootstrap capacitor. An internal watchdog circuit prevents excessive shoot-through currents and protects the external MOSFET switches. The ZL1505 is specified over a wide -40 °C to 125 °C junction temperature range and is available in an exposed pad DFN-10 package. VDD PWMH ...

Page 2

... Junction to Case Thermal Impedance Notes: 1. Θ measured in free air with device mounted on a 4-layer FR4 board and exposed pad soldered to low JA impedance ground plane using multiple vias. For Θ exposed metal pad. 2 ZL1505 Pin VDD PWMH, PWML, LSEL HSEL (V SW BST ...

Page 3

... High-side driver peak gate drive current (pull-down) High-side driver pull-up resistance High-side driver pull-down resistance Notes: 1. The minimum PWMH on-time pulse (t the falling edge. 2. The minimum GH on-time pulse (t 3 ZL1505 Conditions Not switching PWM PWM PWMH or PWML ...

Page 4

... RH GH fall time rise time fall time turn-on propagation delay, t DHR GH turn-off propagation delay, t DHF GL turn-on propagation delay, t DLR GL turn-off propagation delay, t DLF 4 ZL1505 Conditions Min – 2 GNG LSEL connected to VDD 3.0 LSEL connected to GND 1.5 (V – 2.5 V, ...

Page 5

... CGH=3nF, HSEL=BST CGH=3nF, HSEL= 4.5 5 5.5 6 VDD (V) Figure 5 Notes: 1. Performance curves with temperature are measured at ambient temperatures (T and -25 ° timing is shown in Figure 2. GH,ON 5 ZL1505 1 155 150 145 140 135 130 -25 °C 25 °C 125 85 °C 120 6.5 7 7.5 4.5 2 GH, ...

Page 6

... VDD (V) Figure 9 Low-Side Driver Pull-down Current ( ° LSEL=VDD LSEL=GND 1 4.5 5 5.5 6 6.5 VDD (V) Figure 11 6 ZL1505 Minimum PWMH Off-time -25 ° °C 85 ° 7.5 4.5 LS Pull-up Current with Temperature 6.6 5.6 4.6 3.6 2.6 1.6 4.5 7 7.5 LS Pull-down Current with Temperature ...

Page 7

... LSEL=VDD LSEL=GND 4.5 5 5.5 6 6.5 VDD (V) Figure 15 High-Side Driver Pull-up Current ( 2 ° HSEL=BST HSEL=SW 0 4.5 5 5.5 6 6.5 VDD (V) Figure 17 7 ZL1505 RL 6.5 6 5.5 5 4.5 4 3.5 3 7.5 4.5 FL 4.5 4 3 7.5 4.5 HS Pull-up Current with Temperature 5 4.5 4 3.5 3 2 7.5 4.5 t with Temperature nF, LSEL = VDD) GL -25 ° ...

Page 8

... ° 17.5 HSEL=BST HSEL=SW 15.5 13.5 11.5 9.5 7.5 5.5 3.5 4.5 5 5.5 6 6.5 7 VDD (V) Figure 21 High-Side Driver Fall Time nF ° 11.5 HSEL=BST HSEL=SW 9.5 7.5 5.5 3.5 4.5 5 5.5 6 6.5 VDD (V) Figure 23 8 ZL1505 HS Pull-down Current with Temperature 5 4.5 4 3.5 3 2.5 2 1.5 7 7.5 4.5 RH 8.5 7.5 6.5 5.5 4.5 3.5 7.5 4.5 FH 7.5 6.5 5.5 4.5 3.5 7 7.5 4 2.5 V, HSEL = BST -25 °C 25 °C 85 °C 5 5 ...

Page 9

... Pin Descriptions Figure 25. ZL1505 Pin Configurations (top view) Table 4. Pin Descriptions 1 Pin Label Type High-side gate drive current selector. 1 HSEL I Connect to BST for maximum gate drive current; Connect to SW for 50% of maximum gate drive current. Output of high-side gate driver Connect to the gate of high-side FET. ...

Page 10

... ZL2004 ZL1505 V IN 4.5-14V V BIAS 4.5-7.5V VDD GH PWMH PWMH SW ZL1505 PWML PWML GL TEMP+ TEMP- GND of the ZL1505 is 22.5 to 25.5 V. ZL1505 input supply voltage range 1,2 VIN Power Train Module VOUT GND CS+ CS- Data Sheet Revision 2/18/2009 www.intersil.com ...

Page 11

... The ZL1505 integrates two powerful gate drivers that have been optimized for step-down DC-DC conversion circuit configurations whose output current can exceed 40 A per phase. The ZL1505 also integrates bootstrap Schottky diode to minimize the external components and provide a high drive voltage to the high-side driver device ...

Page 12

... Package Dimensions 12 ZL1505 Data Sheet Revision 2/18/2009 www.intersil.com ...

Page 13

... Assigned file number FN6845 to datasheet as this will be the first release with an Intersil file number. Replaced header and footer with Intersil header FN6845.0 and footer. Updated disclaimer information to read “Intersil and it’s subsidiaries including Zilker Labs, Inc.” No changes to datasheet content 13 ZL1505 Description (Table 2) IN Date Feb 2008 ...

Page 14

... OTHERWISE, RESULTING FROM THE REFERENCE DESIGNS OR ANY USE THEREOF. Any use of such reference designs is at your own risk and you agree to indemnify Intersil Corporation and it’s subsidiaries including Zilker Labs, Inc. for any damages resulting from such use. 14 ZL1505 Zilker Labs, Inc. 4301 Westbank Drive Building A-100 ...

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