LM5035AMHX/NOPB National Semiconductor, LM5035AMHX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM5035AMHX/NOPB
• Description: IC PWM BCK BST FLYBK INV 20TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM5035AMHX/NOPB

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 92%
• Voltage - Supply: 13 V ~ 105 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: Yes
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Frequency-max: 1MHz
• For Use With: LM5035AEVAL - BOARD EVAL FOR LM5035ALM5035EVAL - BOARD EVALUATION LM5035
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM5035AMHX

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Order Number
LM5035AMH
LM5035AMHX
LM5035ASQ
LM5035ASQX
LM5035AMH-1
LM5035AMHX-1
TSSOP 20 PIN
Ordering Information
Pin Descriptions for LM5035A and LM5035A–1
LM5035A
1
2
3
4
LM5035A
LLP PIN
23
24
2
3
TSSOP 28 PIN
Package Type
TSSOP-20EP
TSSOP-20EP
LLP-24
LLP-24
TSSOP-28EP
TSSOP-28EP
LM5035A-1
5
6
7
8
COMP
RAMP
Name
UVLO
OVP
4
NSC Package Drawing
MXA20A
MXA20A
SQA24B
SQA24B
MXA28A
MXA28A
Modulator ramp signal
Line Under-Voltage
Lockout
Line Over-Voltage
Protection
Input to the Pulse Width
Modulator
Description
An external RC circuit from VIN
sets the ramp slope. This pin is
discharged at the conclusion of
every cycle by an internal FET.
Discharge is initiated by either the
internal clock or the Volt • Second
clamp comparator.
An external voltage divider from the
power source sets the shutdown
and standby comparator levels.
When UVLO reaches the 0.4V
threshold the VCC and REF
regulators are enabled. When
UVLO reaches the 1.25V
threshold, the SS pin is released
and the device enters the active
mode. Hysteresis is set by an
internal current sink that pulls 23 µA
from the external resistor divider.
An external voltage divider from the
power source sets the shutdown
levels. The threshold is 1.25V.
Hysteresis is set by an internal
current source that sources 23µA
into the external resistor divider.
An external opto-coupler
connected to the COMP pin
sources current into an internal
NPN current mirror. The PWM duty
cycle is maximum with zero input
current, while 1mA reduces the
duty cycle to zero. The current
mirror improves the frequency
response by reducing the AC
voltage across the opto-coupler
detector.
Supplied As
73 Units per Rail
2500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
Rail of 48 Units
2500 Units on Tape and Reel
Application Information