Datasheet

Exposed Pad
Connect to GND
GND 8
VIN 1
VIN 2
PGOOD 3
EN 4
SS 5
COMP 6
FB 7
9 FREQ
10 FPWM
11 SYNC
12 VBIAS
13 VDD
14 BOOT
15 SW
16 SW
LM26001, LM26001Q
SNVS430G –MAY 2006–REVISED MAY 2006 www.ti.com
Connection Diagram
Figure 1. Top View
16-Lead Plastic HTSSOP
PIN DESCRIPTIONS
Pin # Pin Name Description
1 VIN Power supply input
2 VIN Power supply input
3 PGOOD Power Good pin. An open drain output which goes high when the output voltage is greater than 92% of
nominal.
4 EN Enable is an analog level input pin. When pulled below 0.8V, the device enters shutdown mode.
5 SS Soft-start pin. Connect a capacitor from this pin to GND to set the soft-start time.
6 COMP Compensation pin. Connect to a resistor capacitor pair to compensate the control loop.
7 FB Feedback pin. Connect to a resistor divider between Vout and GND to set output voltage.
8 GND Ground
9 FREQ Frequency adjust pin. Connect a resistor from this pin to GND to set the operating frequency.
10 FPWM FPWM is a logic level input pin. For normal operation, connect to GND. When pulled high, sleep mode
operation is disabled.
11 SYNC Frequency synchronization pin. Connect to an external clock signal for synchronized operation. SYNC
must be pulled low for non-synchronized operation.
12 VBIAS Connect to an external 3V or greater supply to bypass the internal regulator for improved efficiency. If
not used, VBIAS should be tied to GND.
13 VDD The output of the internal regulator. Bypass with a minimum 1.0 µF capacitor.
14 BOOT Bootstrap capacitor pin. Connect a 0.1µF minimum ceramic capacitor from this pin to SW to generate
the gate drive bootstrap voltage.
15 SW Switch pin. The source of the internal N-channel switch.
16 SW Switch pin. The source of the internal N-channel switch.
EP EP Exposed Pad thermal connection. Connect to GND.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2 Submit Documentation Feedback Copyright © 2006, Texas Instruments Incorporated
Product Folder Links: LM26001 LM26001Q