LM3370SD-3021/NOPB National Semiconductor, LM3370SD-3021/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM3370SD-3021/NOPB
• Description: IC CONV DC/DC DUAL STPDN 16-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM3370SD-3021/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.2V, 3.3V
• Current - Output: 600mA
• Frequency - Switching: 2MHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-LLP
• Power - Output: 1.54W
• For Use With: LM3370SD-3021EV - BOARD EVALUATION LM3370SD-3021
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM3370SD-3021TR

www.national.com
Package Marking Information (micro SMD)
Pin Descriptions (micro SMD)
Pin #
C1
C2
C3
C4
D1
D2
D3
D4
A1
A2
A3
A4
B1
B2
B3
B4
E1
E2
E3
E4
Top View
PGND1_S
PGND2_S
PGND1
PGND2
nPOR1
nPOR2
SGND
SGND
SGND
Name
SW1
SDA
SW2
SCL
EN2
EN1
V
FB1
V
FB2
V
IN1
IN2
DD
20167377
Buck 1 Switch Pin
Power supply voltage input to PFET and NFET switches for Buck 1
Signal GND
Analog Feedback Input for Buck 1
Buck 1 Power Ground
Buck 1 Power Ground Sense
I
I
Signal supply voltage input, V
Signal GND
Power ON Reset for Buck 1, Open drain output Low when Buck 1 output is 92% of target
output. A 100 kΩ pull up resistor is required
Power ON Reset for Buck 2, Open drain output Low when Buck 2 output is 92% of target
output. A 100 kΩ pull up resistor is required
Buck 2 Power Ground
Buck 2 Power Ground Sense
Buck 2 Enable
Buck 1 Enable
Buck 2 Switch Pin
Power supply voltage input to PFET and NFET switches for Buck 2
Signal GND
Analog feedback for Buck 2
2
2
C Compatible Data, a 2 kΩ pull up resistor is required
C Compatible Clock, a 2 kΩ pull up resistor is required
Bottom View
4
DD
must be equal or greater of the two inputs ( V
20167378
Description
TT = Die Run Traceability
PSB = LM3370TL-3013
micro SMD Marking
S = Switcher Family
XY = Date Code
Top View
IN1
20167379
& V
IN2
)