uP1959
12V MOSFET Drivers with Output Disable
for Single Phase Synchronous-Rectified Buck Converter
Features
General Description
The uP1959 is a dual, high voltage MOSFET driver All-In-One Synchronous Buck Drivers
optimized for driving two N-channel MOSFETs in a
synchronous-rectified buck converter. Each driver is
capable of driving a 5000pF capacitive load with 30ns
transition time. This device combined with uPI multi-phase
Integrated Bootstrap Diode
Adaptive Anti-Shoot-Through Protection
Circuitry
1 PWM Signal Generates both Drivers
Tri-State Input for Bridge Shutdown
buck PWM controller forms a complete core voltage
regulator for advanced micro-processors.
Output Disable Control Turans Off both
The uP1959 features adaptive anti-shoot-through
protection that prevents cross-conduction of the external
MOSFET while maintains minimum deadtime for optimized
efficiency.
MOSFETs
Under Voltage Lockout for Supply Input
WDFN2x2 - 8L and WDFN3x3 - 8L Packages
RoHS Compliant and Halogen Free
This part has integrated bootstrap diode to help minimize
the external component count. Both gate drives are turned
off by pulling low OD# pin or high-impedance at PWM
pin, preventing rapid output capacitor discharge during
system shutdown.
Applications
Desktop CPU Core Voltage Regulators
High Frequency Low Profile DC/DC Converters
High Current Low Voltage DC/DC Converters
This device also supports supply input under voltage
lockout. The uP1959 is available in thermally enhanced
WDFN2x2 - 8L and WDFN3x3 - 8L packages.
Pin Configuration
Ordering Information
BOOT
PWM
OD#
UGATE
PHASE
GND
1
2
3
4
8
7
6
5
Order Number
uP1959PDN8
uP1959QDN8
uP1959RDE8
Package
Top Marking
DU
WDFN2x2 - 8L
WDFN3x3 - 8L
EI
VCC
LGATE
uP1959P
uP1959Q
uP1959R
uP1959R
Note:
PWM
GND
OD#
VCC
BOOT
1
2
3
4
8
7
6
5
(1) Please check the sample/production availability with
uPI representatives.
(2) uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirements. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
UGATE
PHASE
LGATE
PWM
GND
OD#
VCC
BOOT
1
2
3
4
8
7
6
5
UGATE
PHASE
LGATE
uP1959-DS-F0000, May 2014
www.upi-semi.com
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