GM7109HV GM7109HVV2.01. Description. Features. Application. Typical Application Circuits. 150KHz, 60V/3A STEP DOWN VOLTAGE SWITCHING REGULATORS

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1 GM7109H Description Features GM7109H series is designed to provide all the active function for a step-down (buck) switching regulator, and drives a maximum load current as high as 3A line and load regulations. GM7109H is available in fixed output voltages of 3.3, 5, and a versatile Adjustable output version. These regulators are simple to use and require minimum number of external components. The features include internal frequency compensation and a fixed-frequency oscillator. The GM7109H is high-efficiency replacements for popular three-terminal linear regulators, and is requiring a smaller heat sink or even no need heat sink. GM7109H performs well with standard inductors from most of manufacturers, and simplifying the design of switch-mode power supplies. External shutdown is included with 80 µa (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shutdown for full protection under fault conditions. GM7109H operates at a switching frequency of 150 khz which allowing smaller size filter components than what would be needed with lower frequency switching regulators. GM7109H series are available in a standard 8 lead SO package with heat sink Standard ESOP8 package is available 3.3, 5, 12and Adjustable output versions Adjustable version output voltage range 1.23 to 57 OUT accuracy is to ±2% under specified input voltage the output load conditions Input voltage range up to 60 Requires only 4 external components with High efficiency TTL shutdown capability, low power standby mode Built-in thermal shutdown, current limit protection Uses standard inductors 150 khz fixed frequency internal oscillator Application Pre-regulator for linear regulators High-efficiency step-down buck regulator On-card/board switching regulators Positive to negative converter (buck-boost) LCD Monitors Typical Application Circuits Unregulated DC Input C IN GM7109H-5.0 Feedback 3 1 Output 2 ON/OFF 4 5, 6, 7, 8 L1 68μH D1 1N regulated output, C OUT 1

2 GM7109H Marking Information and Pin Configurations Green Products (Top iew) ESOP8 GM7109HG AYWW OUT ON/OFF FB G: Green Product : 33=3.3, 50=5.0, A=ADJ A: Assembly/Testing factory code Y: Year WW: Week 2

3 Ordering Information Green Products GM7109H Ordering Number Output oltage Package Shipping GM7109H-APS8RG Adj ESOP Units / Reel GM7109H-3.3PS8RG 3.3 ESOP Units / Reel GM7109H-5.0PS8RG 5.0 ESOP Units / Reel GM7109H-12PS8RG 12 ESOP Units / Reel 3

4 GM7109H Absolute Maximum Ratings (Note 1) Rating alue Unit Maximum Supply oltage 63 ON/OFF Pin Input oltage -0.3 to Feedback Pin oltage -0.3 to Output oltage to Ground (Steady State) -1.0 Power Dissipation Internally Limited - Thermal Resistance Junction to Ambient ( JA ) ** 2 square inch of FR-4, double sided, 1oz. minimum copper weight, is recommended 36 /W Storage Temperature Range - 65 to 150 Maximum Junction Temperature Operating Temperature Range - 40 to 125 Minimum EDS Rating (Note 2) 2 k Lead Temperature (Soldering, 10 sec) Block Diagram ON/OFF Current Source Bias 1.23 Reference 2.5 Reference Start UP 220 COMP 220m 2.5 Current Limit FB GM COMP 3A Switch R2 AMP R1 COMP Latch Reset Driver For Adj, R2 = 0 and R1 = OPEN Freq. Shift 150KHz OSC Thermal Limit OUTPUT 4

5 GM7109H Electrical Characteristics: GM7109H-ADJ (Specifications with standard type face are for T = 25 C, and those with bold face type apply over full Operating Temperature rage) Output oltage 8 60, 0.2A I LOAD 3A, OUT = 5 OUT Efficiency IN =12, ILOAD=3.0A, OUT = 5 η 79 % Electrical Characteristics: GM7109H-3.3 (Specifications with standard type face are for T = 25 C, and those with bold face type apply over full Operating Temperature rage) Output oltage , 0.2A I LOAD 3A OUT Efficiency IN =12, ILOAD=3.0A η 77 % Electrical Characteristics: GM7109H-5.0 (Specifications with standard type face are for T = 25 C, and those with bold face type apply over full Operating Temperature rage) Output oltage 8 60, 0.2A I LOAD 3A OUT Efficiency IN =12, ILOAD=3.0A η 79 % Electrical Characteristics: GM7109H-12 (Specifications with standard type face are for T = 25 C, and those with bold face type apply over full Operating Temperature rage) Output oltage 15 60, 0.5A I LOAD 3A OUT Efficiency IN =15, ILOAD=3.0A η 83 % 5

6 GM7109H Electrical Characteristics: All Output oltage ersions (Specifications with standard type face are for T J = 25 C, and those with bold face type apply over full Operating Temperature rage. Unless otherwise specified, = 12 for 3.3, 5, and Adjustable version, and = 24 for 12 version, I LOAD = 500mA) Feedback Bias Current FB=1.3 (Adjustable ersion Only) I b Line Regulation 8 60, I LOAD = 0.2A LNR 0.3 % Load Regulation = 12, 0.2A I LOAD 3A LDR 0.3 % Oscillator Frequency Oscillator Frequency of Short Circuit Protection (SCP) Saturation oltage OUT < 40% from Nominal, I OUT = CL I OUT = 3A, No outside circuit, FB=0 f o SAT na khz 50 khz Max Duty Cycle (ON) FB=0, force driver ON DC MAX % Min Duty Cycle (OFF) Current Limit Output Leakage Current FB=12, force driver OFF, ( FB =15 for 12 version) Peak Current, No outside circuit, FB=0 Output=0, No outside circuit, FB=12 Output = -1.0, No outside circuit, FB= DC MIN 0 % l CL A l L µa ma Quiescent Current FB=12, force driver OFF, l Q ma Standby Quiescent Current ON/OFF Pin Logic lnput Level SD Pin lnput Current Thermal Shutdown Temperature ON/OFF Pin = 5 (OFF), = 60 l STBY μa Low (ON) IH High (OFF) IL LOGlC = 2.5 (OFF) I H 5 15 μa LOGlC = 0.5 (ON) I L μa T J Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100pF capacitor discharged through a 1.5KΩresistor into each pin.

7 Test Circuit and Layout Guidelines GM7109H Careful layout is important with any switching regulators. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. To minimize inductance and ground loops, the lengths of the leads indicated by heavy lines in Figure 1&2 below should be kept as short as possible. Single point grounding (as indicated or ground plane construction should be used for best results. When using the Adjustable version, place the programming resistors as close as possible to GM7109H, to keep the sensitive feedback wiring short. Unregulatedd DC Input 1 C IN GM7109H-x.x 3 4 Feedback 2 OUT 5 ON/OFF D1 L1 68μH C OUT OUT L O A D Figure 1 Fixed Ouput otlage ersions C IN =, Aluminum Electrolytic C OUT =, 25, Aluminum Electrolytic D1 = Schottky L1 = 68μH 1 GM7109H-A 4 Feedback 2 L1 68μH OUT Unregulatedd DC Input C IN 3 OUT 5 ON/OFF D1 C OUT R2 R1 L O A D Figure 2 Adjustable Ouput otlage ersions C IN =, Aluminum Electrolytic C OUT =, 25, Aluminum Electrolytic D1 = Schottky L1 = 68μH OUT = REF (1 + R2/R1) 7

8 Package Outline Dimensions ESOP8 GM7109H ( ) (2.286) Inches (mm) ( ) ( ) ( ) ( ) (1.270) TYP ( ) SEATING PLAN ( ) ( ) ( ) 8 MAX 8

9 GM7109H Ordering Number GM 7109H A PS8 R G A P M G amm a C i rcui t Type O u tpu t ol tage P ackage Type S hipping Type A : Ad j 3.3 = =5.0 P S 8: E S OP8 R : Ta ping & Reel T: Tub e G : G ree n Pr oduc ts Note: Green products: Lead-free (RoHS compliant) Halogen free(br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight) 9