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ISL97536IUZ-TK

P1-P3P4-P6P7-P8
1
®
FN6279.1
ISL97536
Monolithic 1A Step-Down Regulator with
Low Quiescent Current
The ISL97536 is a synchronous, integrated FET 1A
step-down regulator with internal compensation. It operates
with an input voltage range from 2.5V to 6V, which
accommodates supplies of 3.3V, 5V, or a Li-ion battery
source. The output can be externally set from 0.8V to V
IN
with a resistive divider.
The ISL97536 features PWM control with a 1.4MHz typical
switching frequency. The typical no load quiescent current is
only 500µA. Additional features include a 100ms Power-On-
Reset output, <1µA shutdown current, short-circuit
protection, and over-temperature protection.
The ISL97536 is available in the 10 Ld MSOP package,
making the entire converter occupy less than 0.15in
2
of PCB
area with components on one side only. The 10 Ld MSOP
package is specified for operation over the full -40°C to
+85°C temperature range.
Features
• Less than 0.15in
2
footprint for the complete 1A converter
• Components on one side of PCB
• Max height 1.1mm MSOP10
• 100ms Power-On-Reset output (POR)
• Internally-compensated voltage mode controller
• Up to 95% efficiency
• <1µA shutdown current
• 500µA quiescent current
• Hiccup mode overcurrent and over-temperature protection
• Pb-free (RoHS compliant)
Applications
• PDA and pocket PC computers
• Bar code readers
• Cellular phones
• Portable test equipment
• Li-ion battery powered devices
• Small form factor (SFP) modules
Pinout and Typical Application Diagram
ISL97536
(10 LD MSOP)
TOP VIEW
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-Free)
PKG. DWG.
#
ISL97536IUZ 7536Z 10 Ld MSOP MDP0043
ISL97536IUZ-TK* 7536Z 10 Ld MSOP
Tape and Reel
MDP0043
ISL97536IUZ-T* 7536Z 10 Ld MSOP
Tape and Reel
MDP0043
*Please refer to TB347 for details on reel specifications.
NOTE: 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.
* V
O
= 0.8V * (1 + R
1
/R
2
)
1
2
3
4
10
9
8
7
5 6
SGND FB
VDD RSI
VIN EN
LX POR
PGND VO
1.8µH
V
O
(1.8V@600mA)
C
1
POR
R
1
*
R
2
*
124kΩ
100kΩ
EN
RSI
100kΩ
C
2
V
S
(2.5V-6V)
100kΩ
R
4
R
5
10µF 10µF
L
1
R
6
100kΩ
0.1µF
R
3
100Ω
C
3
C
4
470pF
Data Sheet November 2, 2007
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
2
FN6279.1
November 2, 2007
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Absolute Maximum Ratings (T
A
= +25°C) Thermal Information
V
IN
, V
DD
, PG to SGND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
IN
+ +0.3V)
SYNC, EN, V
O
, FB to SGND. . . . . . . . . . . . . -0.3V to (V
IN
+ +0.3V)
PGND to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A
Thermal Resistance (Typical, Note 1) θ
JA
(°C/W)
10 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . 130
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
1. θ
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications V
DD
= V
IN
= V
EN
= 3.3V, C1 = C2 = 10µF, L = 1.8µH, V
O
= 1.8V (as shown in “Pinout and Typical Application
Diagram” on page 1), T
A
= -40°C to +85°C unless otherwise specified.
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
DC CHARACTERISTICS
V
FB
Feedback Input Voltage 790 800 810 mV
I
FB
Feedback Input Current 250 nA
V
IN
, V
DD
Input Voltage 2.5 6 V
V
IN,OFF
Minimum Voltage for Shutdown V
IN
falling, T
A
= +25°C only 2 2.2 V
V
IN,ON
Maximum Voltage for Start-up V
IN
rising, T
A
= +25°C only 2.2 2.4 V
I
DD
Supply Current V
IN
= V
DD
= 5V 400 500 µA
EN = 0, V
IN
= V
DD
= 5V 0.1 3 µA
r
DS(ON)-PMOS
PMOS FET Resistance V
DD
= 5V, T
A
= +25°C 70 mΩ
r
DS(ON)-NMOS
NMOS FET Resistance V
DD
= 5V, T
A
= +25°C 45 mΩ
I
LMAX
Current Limit 1.5 A
T
OT,OFF
Over-temperature Threshold T rising 145 °C
T
OT,ON
Over-temperature Hysteresis T falling 130 °C
I
EN
, I
RSI
EN, RSI Current V
EN
, V
RSI
= 0V and 3.3V -1 1 µA
V
EN1
, V
RSI1
EN, RSI Rising Threshold V
DD
= 3.3V 2.4 V
V
EN2
, V
RSI2
EN, RSI Falling Threshold V
DD
= 3.3V 0.8 V
V
POR
Minimum V
FB
for POR, WRT Targeted
V
FB
Value
V
FB
rising 95 %
V
FB
falling 86 %
V
OLPOR
POR Voltage Drop I
SINK
= 3.3mA 35 70 mV
AC CHARACTERISTICS
F
PWM
PWM Switching Frequency 1.25 1.4 1.6 MHz
t
RSI
Minimum RSI Pulse Width Guaranteed by design 25 50 ns
t
SS
Soft-Start Time 650 µs
t
POR
Power On Reset Delay Time 80 100 120 ms
ISL97536
3
FN6279.1
November 2, 2007
Block Diagram
Pin Descriptions
PIN NUMBER PIN NAME PIN FUNCTION
1 SGND Negative supply for the controller stage
2 PGND Negative supply for the power stage
3 LX Inductor drive pin; high current digital output with average voltage equal to the regulator output voltage
4 VIN Positive supply for the power stage
5 VDD Power supply for the controller stage
6 RSI Resets POR timer
7 EN Enable
8 POR Power on reset open drain output
9 VO Output voltage sense
10 FB Voltage feedback input; connected to an external resistor divider between V
O
and SGND for variable
output
-
+
-
+
-
+
-
+
-
+
CONTROL
LOGIC
PWM
COMPEN-
SATION
RAMP
GENERA-
TOR
UNDER-
VOLTAGE
LOCKOUT
POR
CLOCK
SOFT-
START
BANDGAP
REFERENCE
TEMPERATURE
SENSE
+
–
V
IN
LX
PGND
POR
V
O
FB
EN
V
DD
SGND
10pF
5M
124k
100k
10µF
5V
EN
PWM
COMPARATOR
PWM
COMPARATOR
SYNCHRONOUS
RECTIFIER
N-DRIVER
P-DRIVER
CURRENT
SENSE
1.8µH
10µF
100k
POR
1.8V
0 TO 1A
100Ω
0.1µF
470pF
C4
RSI
ISL97536
P1-P3P4-P6P7-P8

ISL97536IUZ-TK

Mfr. #:
Buy ISL97536IUZ-TK
Manufacturer:
Renesas / Intersil
Description:
Switching Voltage Regulators MONOLITH 1A STP-DWNG W/LW QUIESCENT CUR
Lifecycle:
New from this manufacturer.
Delivery:
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